Question
Question 18 1pts A Z score is also a percentile rank. True False Flag this Question Question 19 1pts Regression lines are used for comparison
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).
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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.
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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).
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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
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
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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:
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