Question 181pts

A Z score is also a percentile rank.

True

False

Flag this Question

Question 191pts

Regression lines are used for comparison of two variables to determine similarity.

True

False

Flag this Question

Question 201pts

Regression relationships can be linear, curvilinear, not exist, perfect or imperfect.

True

False

Flag this Question

Question 211pts

The regression line is the line which best describes (fits) the relationship between two distributions.

True

False

Flag this Question

Question 221pts

If a researcher knows the slope and the y-intercept of the regression line, he can graph the line in order to make predictions.

True

False

Flag this Question

Question 231pts

The regression line minimizes prediction errors.

True

False

Flag this Question

Question 242pts

This is an extra credit question.We did not study this, however, based on what we have learned, you might be able to reason it out for two points:

The standard error of estimate gives the average deviation of prediction errors around the correlation line.

True

False

Flag this Question

Question 251pts

Correlation coefficients (like Pearson's r) have the same slope as the slope of the regression line.

True

False

Flag this Question

Question 261pts

Pearson's correlation utilizes z-scores, not raw scores.

True

False

Flag this Question

Question 271pts

Correlation measures quantitatively the magnitude and direction of the relationship.

True

False

Flag this Question

Question 281pts

Descriptive statistics is for describing the sample data, while inferential statistics is for describing populations.

True

False

Flag this Question

Question 291pts

MULTIPLE CHOICE:Answer the following by choosing the best answer, the one that best fits what is being asked.

Research methods are being used today because of:

the need for information to solve social problems.

program costs becoming increasingly more expensive.

the media's interest in popular psychology.

both a and b above.

all of the above.

Flag this Question

Question 301pts

The advantages of the scientific method are:

it provides reliable knowledge without intuition.

its beliefs have been found to be tested and valid.

it gives certain (absolute) knowledge.

it can potentially explain all behavior.

b and c above.

Flag this Question

Question 311pts

Accepting theinformation in a professor's lecture without question is a reliance on:

intuition.

authority.

scientific evidence.

logical reasoning.

Flag this Question

Question 321pts

The purposes of behavioral research is to:

describe and interpret behavior.

predict and make assumptions about behavior.

determine the causes of behavior.

explain and theorize about behavior.

all of the above.

Flag this Question

Question 331pts

When one analyzes data based on a sample, one calculates a:

parameter.

variable.

constant.

statistic.

Flag this Question

Question 341pts

Mathematical methods used to draw tentative conclusions about a population based on sample data are referred to as:

descriptive statistics.

sample statistics.

inferential statistics.

random sampling.

regression analysis.

Flag this Question

Question 351pts

If the values of X are 2, 5, 3, 7, and 9, what is the value for(X-2+4)?(Show your work on scratch paper.)

25.

36.

42.

16.

58.

Flag this Question

Question 361pts

From the information given in Question #35, what is the value of (X)/N ?(Show your work on scratch paper.)

5.2.

5.0.

7.2.

11.6.

Flag this Question

Question 371pts

Using the order of operations, which of the following processes are used to determine the value of (X)2/N?

Square each X, then add the squares together, and then divide the total by N.

Add up all the X's, then divide the sum by N, and then square the total.

Add up all the X's, then square the sum, and then divide the total by N.

Square each X, divide each square by N, then sum the total.

There is not enough information given in order to proceed.

Flag this Question

Question 381pts

Classifying subjects on the basis of gender is an example of what kind of measurement scale?

nominal.

ordinal.

interval.

ratio.

gender.

Flag this Question

Question 391pts

Using an ordinal scale to measure leadership, which of the following statements is appropriate for the type of measurement scale?

Person A has twice as much leadership ability as Person B.

Person X has no leadership ability.

Person Y has the most leadership ability.

Leadership is not measurable.

All of the above.

Flag this Question

Question 401pts

Counting the number of legs on a centipede (a bug) is an example of a ___________ measurement scale.

nominal.

ordinal.

interval.

ratio.

continuous.

Flag this Question

Question 411pts

A problem with using the "commonsense" (tradition) approach to gain knowledge is that:

the ideas are usually untestable.

everybody knows their notions are true so testing them is unnecessary.

commonsense notions are often incorrect when scientifically studied.

one should not question established fact.

Flag this Question

Question 421pts

A researcher investigated the relationship between test length and grades in a course.She found that students who took longer exams received better grades than students who took shorter exams.The independent variable in this study was:

test grades.

class size.

gender of the students.

length of the test.

Flag this Question

Question 431pts

From the information given in Question #42, the dependent variable was:

test grades.

class size.

gender of the students.

length of the test.

Flag this Question

Question 441pts

From the information given in Question #42, what type of relationship between test length and grades was found?

no relationship.

negative.

positive.

curvilinear.

Flag this Question

Question 451pts

A researcher observed that drinking coffee improved performance on complex math problems up to a point.The researcher also noted, however, that excessive coffee drinking actually interferes with problem solving.What type of relationship was observed?

.no relationship.

positive linear

negative linear.

curvilinear.

Flag this Question

Question 461pts

The following are raw scores from data you collected:

587068596247905745

689383454855325836

637160416584424087

758180617276735280

If youhadto group the above raw scores into a frequency distribution of approximately 10 intervals of equal width, answer the following Questions#46-48using this information.(Note: you can answer the questions without rearranging the numbers into a frequency table.Reason it out.)

Question 46. The value ofi(interval width) is:

5.5.

4.

6.

5.

Flag this Question

Question 471pts

From the information given in Question #46, to calculate central tendency for the above frequency distribution, one would probably use the:

mode.

median.

mean.

range.

standard deviation.

Flag this Question

Question 481pts

From the information given in Question #46, if the lowest score in the above distribution is used as the lower limit for the lowest class interval, the lowest class interval range would be:

30-35.

32-36.

32-37.

30-34.

Flag this Question

Question 491pts

For questions #49-52, use the following sample scores: 5, 2, 8, 3, 2, 4, 12.

The mode for this distribution is:

2

3

8

There is no mode.

Flag this Question

Question 501pts

For questions #49-52, use the following sample scores: 5, 2, 8, 3, 2, 4, 12.

The mean is:(show your work on another sheet of paper and enter your answer below.Note:you will upload all your calculation work at the end of the test.)

3.52.

5.43.

4.75.

5.14.

Flag this Question

Question 511pts

For questions #49-52, use the following sample scores: 5, 2, 8, 3, 2, 4, 12.

The range is:

9.

10.

12.

13.

Flag this Question

Question 522pts

For questions #49-52, use the following sample scores: 5, 2, 8, 3, 2, 4, 12.

The standard deviation is:(show your work on another sheet of paper and enter your answer below.Note:you will upload all your calculation work at the end of the test.)(Worth 2 points)

Flag this Question

Question 531pts

Which of the following isNOTa property of the mean?(i.e. All of the following are properties of the mean except...)

The mean is sensitive to the exact values of all the scores.

The sum of the deviations about the mean equals zero.

The mean is not subject to sampling variation.

The mean is most affected by extreme scores.

Flag this Question

Question 541pts

Which of the following isNOTa property of the normal curve?(i.e. All of the following are properties of the normal curve except...)

It is symmetrical.

It is negatively or positively skewed.

It approaches but never touches the x-axis.

It is bell-shaped.

Flag this Question

Question 551pts

What percentage of the area under the normal curve is contained within:(Hint: If you don't know the standard percentages, see formula sheet)

1 standard deviation? [ Select ] ["95.4%", "34.13%", "13.59%", "27.18%"]

2 standard deviations? [ Select ] ["47.72%", "68.3%", "15.74%", "34.13%"]

3 standard deviations? [ Select ] ["68.3%", "47.72%", "95.4%", "49.87%"]

Beyond 3 deviations? [ Select ] ["99.7%", "100%", "0.13%", "2.15%"]

Flag this Question

Question 561pts

If the mean height of college males was 70" with a standard deviation of 3", approximately what percentage of college males would be between 6'1" and 6'4"(Note: 12 inches = 1 foot)?

68%.

14%.

48%.

2%.

No students in this range.

Flag this Question

Question 571pts

Using the data from question #56, determine the z score for a height of 5'8"(show your work on another sheet of paper and enter your answer below.Note:you will upload all your calculation work at the end of the test.).

2/3.

0.667.

-2/3.

-1.0

0.

Flag this Question

Question 581pts

Correlation and regression differ in that:

correlation is primarily concerned with the size and direction of relationships.

regression is primarily used for prediction.

the slopes of each are the same.

both a and b above.

all of the above.

Flag this Question

Question 591pts

In the equation of the regression line (y = bx + a):

b is the x-intercept and a is the slope.

b is the y-intercept and a is the slope.

a is the x-intercept and b is the slope.

a is the y-intercept and b is the slope.

Flag this Question

Question 601pts

In a perfect relationship:

all the points fall on the regression line.

none of the points fall on the regression line.

some of the points fall on the regression line.

the points form an ellipse around the regression line.

Flag this Question

Question 611pts

In an imperfect relationship:

all of the points fall on the regression line.

a relationship exists, but all of the points do not fall on the regression line.

no relationship exists.

a relationship exists, but none of the points can fall on the regression line.

Flag this Question

Question 622pts

During the last five years there has been an inflationary trend in the average cost of a gallon of milk, as the following chart shows.Calculate the slope of the regression line.(show your work on another sheet of paper and enter your answer below.Note:you will upload all your calculation work at the end of the test.).

X (Years)12345Y (Dollars)$1.10$1.23$1.30$1.50$1.65The slope (b) of the regression line is:

Flag this Question

Question 632pts

During the last five years there has been an inflationary trend in the average cost of a gallon of milk, as the following chart shows.Calculate the y-intercept of the regression line.(show your work on another sheet of paper and enter your answer below.Note:you will upload all your calculation work at the end of the test.).

X (Years)12345Y (Dollars)$1.10$1.23$1.30$1.50$1.65The y-intercept (a) of the regression line is:

Flag this Question

Question 642pts

During the last five years there has been an inflationary trend in the average cost of a gallon of milk, as the following chart shows.Calculate Pearson's r correlation coefficient.(show your work on another sheet of paper and enter your answer below.Note:you will upload all your calculation work at the end of the test.).

X (Years)12345Y (Dollars)$1.10$1.23$1.30$1.50$1.65Using the above data, calculate Pearson's r correlation coefficient (show your work):

Flag this Question

Question 651pts

The lowest degree (i.e. weakest) of Pearson's correlation shown below is:

0.75

-0.33

-0.25

0.15

Flag this Question

Question 661pts

The Pearson correlation coefficient between heights from the ground of two people on the opposite ends of a see-saw would be:

1.0

0.0

-1.0

0,5

Flag this Question

Question 671pts

If the Pearson's correlation between X and Y is 0.70, which of the following might be true?

X causes Y.

Y causes X.

Neither X or Y cause each other.

a and b above.

all of the above.

Flag this Question

Question 682pts

Pearson's r assumes linear continuous interval/ratio variables.What would be the correlation coefficient utilized if your variables were discrete and ordinal?(Note:This is an extra credit question.We didn't study this and you didn't have to know it, however, if you reason it through based on what you have learned, you can get an extra point.)

Eta.

Pearson's.

Spearman's.

Tengler's.

Flag this Question

Question 691pts

Which of the following is/are part of descriptive statistics?

central tendency.

variability.

regression.

correlation.

all of the above.

Flag this Question

Question 705pts

MATCHING:Match the left side with the right side.

Ways of Knowing Information: (one answer per question)

tradition

[ Choose ] propositions and deductions test all before accepting it's always been done this way information is revealed, taken by faith internal sense of right

logical reasoning

[ Choose ] propositions and deductions test all before accepting it's always been done this way information is revealed, taken by faith internal sense of right

scientific method

[ Choose ] propositions and deductions test all before accepting it's always been done this way information is revealed, taken by faith internal sense of right

authority

[ Choose ] propositions and deductions test all before accepting it's always been done this way information is revealed, taken by faith internal sense of right

intuition

[ Choose ] propositions and deductions test all before accepting it's always been done this way information is revealed, taken by faith internal sense of right

Flag this Question

Question 711pts

For the following measurement scale, check all the boxes below that are characteristics of that measurement scale (i.e. match all that apply): (more than one answer possible per question).

nominal measurement scale

equal distance between whole numbers

quantity

magnitude

order

Flag this Question

Question 721pts

For the following measurement scale, check all the boxes below that are characteristics of that measurement scale (i.e. match all that apply): (more than one answer possible per question).

ordinal measurement scale

equal distance between whole numbers

quantity

magnitude

order

Flag this Question

Question 731pts

For the following measurement scale, check all the boxes below that are characteristics of that measurement scale (i.e. match all that apply): (more than one answer possible per question).

interval / ratio measurement scale

equal distance between whole numbers

quantity

magnitude

order

Flag this Question

Question 740pts

If you have testing time available, upload your scratch paper, containing your explanations for answers and your calculation work, here.(Note: you can only upload one file here, so you will need to combine the scans of your scratch paper into one Word or pdf document to upload through Question 74.)If the test closes before you have a chance to upload your scratch paper, then you can upload your scratch paper and verification statement within 1-2 hours after completing the exam.through theMidterm Exam Upload page(click on Assignments tab, look under Exams).

UploadChoose a File

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Time Running:HideAttempt due: Oct 23 at 11:59pm

Question 181pts

A Z score is also a percentile rank.

True

False

Flag this Question

Question 191pts

Regression lines are used for comparison of two variables to determine similarity.

True

False

Flag this Question

Question 201pts

Regression relationships can be linear, curvilinear, not exist, perfect or imperfect.

True

False

Flag this Question

Question 211pts

The regression line is the line which best describes (fits) the relationship between two distributions.

True

False

Flag this Question

Question 221pts

If a researcher knows the slope and the y-intercept of the regression line, he can graph the line in order to make predictions.

True

False

Flag this Question

Question 231pts

The regression line minimizes prediction errors.

True

False

Flag this Question

Question 242pts

This is an extra credit question.We did not study this, however, based on what we have learned, you might be able to reason it out for two points:

The standard error of estimate gives the average deviation of prediction errors around the correlation line.

True

False

Flag this Question

Question 251pts

Correlation coefficients (like Pearson's r) have the same slope as the slope of the regression line.

True

False

Flag this Question

Question 261pts

Pearson's correlation utilizes z-scores, not raw scores.

True

False

Flag this Question

Question 271pts

Correlation measures quantitatively the magnitude and direction of the relationship.

True

False

Flag this Question

Question 281pts

Descriptive statistics is for describing the sample data, while inferential statistics is for describing populations.

True

False

Flag this Question

Question 291pts

MULTIPLE CHOICE:Answer the following by choosing the best answer, the one that best fits what is being asked.

Research methods are being used today because of:

the need for information to solve social problems.

program costs becoming increasingly more expensive.

the media's interest in popular psychology.

both a and b above.

all of the above.

Flag this Question

Question 301pts

The advantages of the scientific method are:

it provides reliable knowledge without intuition.

its beliefs have been found to be tested and valid.

it gives certain (absolute) knowledge.

it can potentially explain all behavior.

b and c above.

Flag this Question

Question 311pts

Accepting theinformation in a professor's lecture without question is a reliance on:

intuition.

authority.

scientific evidence.

logical reasoning.

Flag this Question

Question 321pts

The purposes of behavioral research is to:

describe and interpret behavior.

predict and make assumptions about behavior.

determine the causes of behavior.

explain and theorize about behavior.

all of the above.

Flag this Question

Question 331pts

When one analyzes data based on a sample, one calculates a:

parameter.

variable.

constant.

statistic.

Flag this Question

Question 341pts

Mathematical methods used to draw tentative conclusions about a population based on sample data are referred to as:

descriptive statistics.

sample statistics.

inferential statistics.

random sampling.

regression analysis.

Flag this Question

Question 351pts

If the values of X are 2, 5, 3, 7, and 9, what is the value for(X-2+4)?(Show your work on scratch paper.)

25.

36.

42.

16.

58.

Flag this Question

Question 361pts

From the information given in Question #35, what is the value of (X)/N ?(Show your work on scratch paper.)

5.2.

5.0.

7.2.

11.6.

Flag this Question

Question 371pts

Using the order of operations, which of the following processes are used to determine the value of (X)2/N?

Square each X, then add the squares together, and then divide the total by N.

Add up all the X's, then divide the sum by N, and then square the total.

Add up all the X's, then square the sum, and then divide the total by N.

Square each X, divide each square by N, then sum the total.

There is not enough information given in order to proceed.

Flag this Question

Question 381pts

Classifying subjects on the basis of gender is an example of what kind of measurement scale?

nominal.

ordinal.

interval.

ratio.

gender.

Flag this Question

Question 391pts

Using an ordinal scale to measure leadership, which of the following statements is appropriate for the type of measurement scale?

Person A has twice as much leadership ability as Person B.

Person X has no leadership ability.

Person Y has the most leadership ability.

Leadership is not measurable.

All of the above.

Flag this Question

Question 401pts

Counting the number of legs on a centipede (a bug) is an example of a ___________ measurement scale.

nominal.

ordinal.

interval.

ratio.

continuous.

Flag this Question

Question 411pts

A problem with using the "commonsense" (tradition) approach to gain knowledge is that:

the ideas are usually untestable.

everybody knows their notions are true so testing them is unnecessary.

commonsense notions are often incorrect when scientifically studied.

one should not question established fact.

Flag this Question

Question 421pts

A researcher investigated the relationship between test length and grades in a course.She found that students who took longer exams received better grades than students who took shorter exams.The independent variable in this study was:

test grades.

class size.

gender of the students.

length of the test.

Flag this Question

Question 431pts

From the information given in Question #42, the dependent variable was:

test grades.

class size.

gender of the students.

length of the test.

Flag this Question

Question 441pts

From the information given in Question #42, what type of relationship between test length and grades was found?

no relationship.

negative.

positive.

curvilinear.

Flag this Question

Question 451pts

A researcher observed that drinking coffee improved performance on complex math problems up to a point.The researcher also noted, however, that excessive coffee drinking actually interferes with problem solving.What type of relationship was observed?

.no relationship.

positive linear

negative linear.

curvilinear.

Flag this Question

Question 461pts

The following are raw scores from data you collected:

587068596247905745

689383454855325836

637160416584424087

758180617276735280

If youhadto group the above raw scores into a frequency distribution of approximately 10 intervals of equal width, answer the following Questions#46-48using this information.(Note: you can answer the questions without rearranging the numbers into a frequency table.Reason it out.)

Question 46. The value ofi(interval width) is:

5.5.

4.

6.

5.

Flag this Question

Question 471pts

From the information given in Question #46, to calculate central tendency for the above frequency distribution, one would probably use the:

mode.

median.

mean.

range.

standard deviation.

Flag this Question

Question 481pts

From the information given in Question #46, if the lowest score in the above distribution is used as the lower limit for the lowest class interval, the lowest class interval range would be:

30-35.

32-36.

32-37.

30-34.

Flag this Question

Question 491pts

For questions #49-52, use the following sample scores: 5, 2, 8, 3, 2, 4, 12.

The mode for this distribution is:

2

3

8

There is no mode.

Flag this Question

Question 501pts

For questions #49-52, use the following sample scores: 5, 2, 8, 3, 2, 4, 12.

The mean is:(show your work on another sheet of paper and enter your answer below.Note:you will upload all your calculation work at the end of the test.)

3.52.

5.43.

4.75.

5.14.

Flag this Question

Question 511pts

For questions #49-52, use the following sample scores: 5, 2, 8, 3, 2, 4, 12.

The range is:

9.

10.

12.

13.

Flag this Question

Question 522pts

For questions #49-52, use the following sample scores: 5, 2, 8, 3, 2, 4, 12.

The standard deviation is:(show your work on another sheet of paper and enter your answer below.Note:you will upload all your calculation work at the end of the test.)(Worth 2 points)

Flag this Question

Question 531pts

Which of the following isNOTa property of the mean?(i.e. All of the following are properties of the mean except...)

The mean is sensitive to the exact values of all the scores.

The sum of the deviations about the mean equals zero.

The mean is not subject to sampling variation.

The mean is most affected by extreme scores.

Flag this Question

Question 541pts

Which of the following isNOTa property of the normal curve?(i.e. All of the following are properties of the normal curve except...)

It is symmetrical.

It is negatively or positively skewed.

It approaches but never touches the x-axis.

It is bell-shaped.

Flag this Question

Question 551pts

What percentage of the area under the normal curve is contained within:(Hint: If you don't know the standard percentages, see formula sheet)

1 standard deviation? [ Select ] ["95.4%", "34.13%", "13.59%", "27.18%"]

2 standard deviations? [ Select ] ["47.72%", "68.3%", "15.74%", "34.13%"]

3 standard deviations? [ Select ] ["68.3%", "47.72%", "95.4%", "49.87%"]

Beyond 3 deviations? [ Select ] ["99.7%", "100%", "0.13%", "2.15%"]

Flag this Question

Question 561pts

If the mean height of college males was 70" with a standard deviation of 3", approximately what percentage of college males would be between 6'1" and 6'4"(Note: 12 inches = 1 foot)?

68%.

14%.

48%.

2%.

No students in this range.

Flag this Question

Question 571pts

Using the data from question #56, determine the z score for a height of 5'8"(show your work on another sheet of paper and enter your answer below.Note:you will upload all your calculation work at the end of the test.).

2/3.

0.667.

-2/3.

-1.0

0.

Flag this Question

Question 581pts

Correlation and regression differ in that:

correlation is primarily concerned with the size and direction of relationships.

regression is primarily used for prediction.

the slopes of each are the same.

both a and b above.

all of the above.

Flag this Question

Question 591pts

In the equation of the regression line (y = bx + a):

b is the x-intercept and a is the slope.

b is the y-intercept and a is the slope.

a is the x-intercept and b is the slope.

a is the y-intercept and b is the slope.

Flag this Question

Question 601pts

In a perfect relationship:

all the points fall on the regression line.

none of the points fall on the regression line.

some of the points fall on the regression line.

the points form an ellipse around the regression line.

Flag this Question

Question 611pts

In an imperfect relationship:

all of the points fall on the regression line.

a relationship exists, but all of the points do not fall on the regression line.

no relationship exists.

a relationship exists, but none of the points can fall on the regression line.

Flag this Question

Question 622pts

During the last five years there has been an inflationary trend in the average cost of a gallon of milk, as the following chart shows.Calculate the slope of the regression line.(show your work on another sheet of paper and enter your answer below.Note:you will upload all your calculation work at the end of the test.).

X (Years)12345Y (Dollars)$1.10$1.23$1.30$1.50$1.65The slope (b) of the regression line is:

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Question 632pts

During the last five years there has been an inflationary trend in the average cost of a gallon of milk, as the following chart shows.Calculate the y-intercept of the regression line.(show your work on another sheet of paper and enter your answer below.Note:you will upload all your calculation work at the end of the test.).

X (Years)12345Y (Dollars)$1.10$1.23$1.30$1.50$1.65The y-intercept (a) of the regression line is:

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Question 642pts

During the last five years there has been an inflationary trend in the average cost of a gallon of milk, as the following chart shows.Calculate Pearson's r correlation coefficient.(show your work on another sheet of paper and enter your answer below.Note:you will upload all your calculation work at the end of the test.).

X (Years)12345Y (Dollars)$1.10$1.23$1.30$1.50$1.65Using the above data, calculate Pearson's r correlation coefficient (show your work):

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Question 651pts

The lowest degree (i.e. weakest) of Pearson's correlation shown below is:

0.75

-0.33

-0.25

0.15

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Question 661pts

The Pearson correlation coefficient between heights from the ground of two people on the opposite ends of a see-saw would be:

1.0

0.0

-1.0

0,5

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Question 671pts

If the Pearson's correlation between X and Y is 0.70, which of the following might be true?

X causes Y.

Y causes X.

Neither X or Y cause each other.

a and b above.

all of the above.

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Question 682pts

Pearson's r assumes linear continuous interval/ratio variables.What would be the correlation coefficient utilized if your variables were discrete and ordinal?(Note:This is an extra credit question.We didn't study this and you didn't have to know it, however, if you reason it through based on what you have learned, you can get an extra point.)

Eta.

Pearson's.

Spearman's.

Tengler's.

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Question 691pts

Which of the following is/are part of descriptive statistics?

central tendency.

variability.

regression.

correlation.

all of the above.

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Question 705pts

MATCHING:Match the left side with the right side.

Ways of Knowing Information: (one answer per question)

tradition

[ Choose ] propositions and deductions test all before accepting it's always been done this way information is revealed, taken by faith internal sense of right

logical reasoning

[ Choose ] propositions and deductions test all before accepting it's always been done this way information is revealed, taken by faith internal sense of right

scientific method

[ Choose ] propositions and deductions test all before accepting it's always been done this way information is revealed, taken by faith internal sense of right

authority

[ Choose ] propositions and deductions test all before accepting it's always been done this way information is revealed, taken by faith internal sense of right

intuition

[ Choose ] propositions and deductions test all before accepting it's always been done this way information is revealed, taken by faith internal sense of right

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Question 711pts

For the following measurement scale, check all the boxes below that are characteristics of that measurement scale (i.e. match all that apply): (more than one answer possible per question).

nominal measurement scale

equal distance between whole numbers

quantity

magnitude

order

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Question 721pts

For the following measurement scale, check all the boxes below that are characteristics of that measurement scale (i.e. match all that apply): (more than one answer possible per question).

ordinal measurement scale

equal distance between whole numbers

quantity

magnitude

order

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Question 731pts

For the following measurement scale, check all the boxes below that are characteristics of that measurement scale (i.e. match all that apply): (more than one answer possible per question).

interval / ratio measurement scale

equal distance between whole numbers

quantity

magnitude

order

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Question 740pts

If you have testing time available, upload your scratch paper, containing your explanations for answers and your calculation work, here.(Note: you can only upload one file here, so you will need to combine the scans of your scratch paper into one Word or pdf document to upload through Question 74.)If the test closes before you have a chance to upload your scratch paper, then you can upload your scratch paper and verification statement within 1-2 hours after completing the exam.through theMidterm Exam Upload page(click on Assignments tab, look under Exams).

UploadChoose a File

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Time Running:HideAttempt due: Oct 23 at 11:59pm

Question 181pts

A Z score is also a percentile rank.

True

False

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Question 191pts

Regression lines are used for comparison of two variables to determine similarity.

True

False

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Question 201pts

Regression relationships can be linear, curvilinear, not exist, perfect or imperfect.

True

False

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Question 211pts

The regression line is the line which best describes (fits) the relationship between two distributions.

True

False

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Question 221pts

If a researcher knows the slope and the y-intercept of the regression line, he can graph the line in order to make predictions.

True

False

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Question 231pts

The regression line minimizes prediction errors.

True

False

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Question 242pts

This is an extra credit question.We did not study this, however, based on what we have learned, you might be able to reason it out for two points:

The standard error of estimate gives the average deviation of prediction errors around the correlation line.

True

False

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Question 251pts

Correlation coefficients (like Pearson's r) have the same slope as the slope of the regression line.

True

False

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Question 261pts

Pearson's correlation utilizes z-scores, not raw scores.

True

False

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Question 271pts

Correlation measures quantitatively the magnitude and direction of the relationship.

True

False

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Question 281pts

Descriptive statistics is for describing the sample data, while inferential statistics is for describing populations.

True

False

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Question 291pts

MULTIPLE CHOICE:Answer the following by choosing the best answer, the one that best fits what is being asked.

Research methods are being used today because of:

the need for information to solve social problems.

program costs becoming increasingly more expensive.

the media's interest in popular psychology.

both a and b above.

all of the above.

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Question 301pts

The advantages of the scientific method are:

it provides reliable knowledge without intuition.

its beliefs have been found to be tested and valid.

it gives certain (absolute) knowledge.

it can potentially explain all behavior.

b and c above.

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Question 311pts

Accepting theinformation in a professor's lecture without question is a reliance on:

intuition.

authority.

scientific evidence.

logical reasoning.

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Question 321pts

The purposes of behavioral research is to:

describe and interpret behavior.

predict and make assumptions about behavior.

determine the causes of behavior.

explain and theorize about behavior.

all of the above.

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Question 331pts

When one analyzes data based on a sample, one calculates a:

parameter.

variable.

constant.

statistic.

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Question 341pts

Mathematical methods used to draw tentative conclusions about a population based on sample data are referred to as:

descriptive statistics.

sample statistics.

inferential statistics.

random sampling.

regression analysis.

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Question 351pts

If the values of X are 2, 5, 3, 7, and 9, what is the value for(X-2+4)?(Show your work on scratch paper.)

25.

36.

42.

16.

58.

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Question 361pts

From the information given in Question #35, what is the value of (X)/N ?(Show your work on scratch paper.)

5.2.

5.0.

7.2.

11.6.

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Question 371pts

Using the order of operations, which of the following processes are used to determine the value of (X)2/N?

Square each X, then add the squares together, and then divide the total by N.

Add up all the X's, then divide the sum by N, and then square the total.

Add up all the X's, then square the sum, and then divide the total by N.

Square each X, divide each square by N, then sum the total.

There is not enough information given in order to proceed.

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Question 381pts

Classifying subjects on the basis of gender is an example of what kind of measurement scale?

nominal.

ordinal.

interval.

ratio.

gender.

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Question 391pts

Using an ordinal scale to measure leadership, which of the following statements is appropriate for the type of measurement scale?

Person A has twice as much leadership ability as Person B.

Person X has no leadership ability.

Person Y has the most leadership ability.

Leadership is not measurable.

All of the above.

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Question 401pts

Counting the number of legs on a centipede (a bug) is an example of a ___________ measurement scale.

nominal.

ordinal.

interval.

ratio.

continuous.

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Question 411pts

A problem with using the "commonsense" (tradition) approach to gain knowledge is that:

the ideas are usually untestable.

everybody knows their notions are true so testing them is unnecessary.

commonsense notions are often incorrect when scientifically studied.

one should not question established fact.

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Question 421pts

A researcher investigated the relationship between test length and grades in a course.She found that students who took longer exams received better grades than students who took shorter exams.The independent variable in this study was:

test grades.

class size.

gender of the students.

length of the test.

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Question 431pts

From the information given in Question #42, the dependent variable was:

test grades.

class size.

gender of the students.

length of the test.

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Question 441pts

From the information given in Question #42, what type of relationship between test length and grades was found?

no relationship.

negative.

positive.

curvilinear.

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Question 451pts

A researcher observed that drinking coffee improved performance on complex math problems up to a point.The researcher also noted, however, that excessive coffee drinking actually interferes with problem solving.What type of relationship was observed?

.no relationship.

positive linear

negative linear.

curvilinear.

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Question 461pts

The following are raw scores from data you collected:

587068596247905745

689383454855325836

637160416584424087

758180617276735280

If youhadto group the above raw scores into a frequency distribution of approximately 10 intervals of equal width, answer the following Questions#46-48using this information.(Note: you can answer the questions without rearranging the numbers into a frequency table.Reason it out.)

Question 46. The value ofi(interval width) is:

5.5.

4.

6.

5.

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Question 471pts

From the information given in Question #46, to calculate central tendency for the above frequency distribution, one would probably use the:

mode.

median.

mean.

range.

standard deviation.

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Question 481pts

From the information given in Question #46, if the lowest score in the above distribution is used as the lower limit for the lowest class interval, the lowest class interval range would be:

30-35.

32-36.

32-37.

30-34.

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Question 491pts

For questions #49-52, use the following sample scores: 5, 2, 8, 3, 2, 4, 12.

The mode for this distribution is:

2

3

8

There is no mode.

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Question 501pts

For questions #49-52, use the following sample scores: 5, 2, 8, 3, 2, 4, 12.

The mean is:(show your work on another sheet of paper and enter your answer below.Note:you will upload all your calculation work at the end of the test.)

3.52.

5.43.

4.75.

5.14.

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Question 511pts

For questions #49-52, use the following sample scores: 5, 2, 8, 3, 2, 4, 12.

The range is:

9.

10.

12.

13.

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Question 522pts

For questions #49-52, use the following sample scores: 5, 2, 8, 3, 2, 4, 12.

The standard deviation is:(show your work on another sheet of paper and enter your answer below.Note:you will upload all your calculation work at the end of the test.)(Worth 2 points)

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Question 531pts

Which of the following isNOTa property of the mean?(i.e. All of the following are properties of the mean except...)

The mean is sensitive to the exact values of all the scores.

The sum of the deviations about the mean equals zero.

The mean is not subject to sampling variation.

The mean is most affected by extreme scores.

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Question 541pts

Which of the following isNOTa property of the normal curve?(i.e. All of the following are properties of the normal curve except...)

It is symmetrical.

It is negatively or positively skewed.

It approaches but never touches the x-axis.

It is bell-shaped.

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Question 551pts

What percentage of the area under the normal curve is contained within:(Hint: If you don't know the standard percentages, see formula sheet)

1 standard deviation? [ Select ] ["95.4%", "34.13%", "13.59%", "27.18%"]

2 standard deviations? [ Select ] ["47.72%", "68.3%", "15.74%", "34.13%"]

3 standard deviations? [ Select ] ["68.3%", "47.72%", "95.4%", "49.87%"]

Beyond 3 deviations? [ Select ] ["99.7%", "100%", "0.13%", "2.15%"]

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Question 561pts

If the mean height of college males was 70" with a standard deviation of 3", approximately what percentage of college males would be between 6'1" and 6'4"(Note: 12 inches = 1 foot)?

68%.

14%.

48%.

2%.

No students in this range.

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Question 571pts

Using the data from question #56, determine the z score for a height of 5'8"(show your work on another sheet of paper and enter your answer below.Note:you will upload all your calculation work at the end of the test.).

2/3.

0.667.

-2/3.

-1.0

0.

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Question 581pts

Correlation and regression differ in that:

correlation is primarily concerned with the size and direction of relationships.

regression is primarily used for prediction.

the slopes of each are the same.

both a and b above.

all of the above.

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Question 591pts

In the equation of the regression line (y = bx + a):

b is the x-intercept and a is the slope.

b is the y-intercept and a is the slope.

a is the x-intercept and b is the slope.

a is the y-intercept and b is the slope.

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Question 601pts

In a perfect relationship:

all the points fall on the regression line.

none of the points fall on the regression line.

some of the points fall on the regression line.

the points form an ellipse around the regression line.

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Question 611pts

In an imperfect relationship: