Module 06Content

1. Question 11 Point
2. Question 21 Point
3. Question 31 Point
4. Question 41 Point
5. Question 51 Point
6. Question 61 Point
7. Question 71 Point
8. Question 81 Point
9. Question 91 Point
10. Question 101 Point
11. Question 111 Point
12. Question 121 Point
13. Question 131 Point
14. Question 141 Point
15. Question 151 Point

What type of correlation would you expect from the following variables: test scores and shoe sizes?

Negative Correlation

Positive Correlation

Nonlinear Correlation

No Correlation

A restaurant sells pizza at a price determined by the number of toppings. If the linear regression equation can be represented by y = 12 + 1.5x, determine the price of a pizza if you order 8 toppings. Assume that this is a good model.

$24

$8

$12

$22

When comparing two variables, you calculate r = -0.76 and find the CV = 0.586. What should your conclusion be when running a hypothesis test for linear correlation?

There is no sufficient evidence to support the claim of a linear correlation.

There is sufficient evidence to support the claim of a linear correlation.

There may or may not be a linear correlation between the two variables.

There is sufficient evidence to support the claim of a non-linear correlation.

Describe the correlation associated with the scatter plot below.

Positive, strong

Positive, weak

Negative, strong

Negative, weak

When would you need to use the average of the y-values to make a prediction instead of the regression line?

The r value indicates there is not a linear correlation between the variables.

The prediction is not far outside of the scope of the available data.

The points on the scatterplot closely fit the regression line when graphed.

The y-values are closely grouped together in the range.

A correlation shows that two variables are ____________.

Related

Unrelated

Causing each other

Linearly related

Which of the following values of r is the WEAKEST negative correlation?

r = -0.95

r = -0.72

r = -0.32

r = -0.51

If Andrew works 40 hours, how much is he expected to earn based on the scatterplot which represents his pay below?

$600

$1000

$700

$400

The annual profits for a company are given in the following table, where x represents the number of years since 2010, and y represents the profit in thousands of dollars. Determine the linear regression equation that represents this set of data, rounding all coefficients to the nearest hundredth.

y = 134.4 + 22.8x

y = 22.8 + 134.4x

y = -3.005 + 0.0278x

y = 0.0278 - 3.005x

Data is analyzed comparing hours studied and grades. It is determined that the correlation coefficient is 0.87. What type of correlation exists between these two variables?

Strong positive correlation

Strong negative correlation

Weak positive correlation

No correlation

If a set of variables both change in the same direction when graphed, what type of correlation would best represent the correlation?

Negative Correlation

Positive Correlation

Nonlinear Correlation

No Correlation

Which of the following is NOT a reason why we use a scatterplot to graph correlation?

The dots reveal the direction of change in the variables.

The dots reveal how spread out the data is from the line which approximates the data.

The dots illustrate various degrees of correlation.

The dots calculate the linear correlation value, r.

Which Excel formula calculates the linear correlation coefficient r?

CORREL

AVERAGE

T.INV

R.COEF

What type of correlation would you expect from the following variables: the number of hours you studied and your grade?

Negative Correlation

Positive Correlation

Nonlinear Correlation

No Correlation

Which variable is used to represent the predictor variable?

x

y

r

p

Module 06Content

1. Question 11 Point
2. Question 21 Point
3. Question 31 Point
4. Question 41 Point
5. Question 51 Point
6. Question 61 Point
7. Question 71 Point
8. Question 81 Point
9. Question 91 Point
10. Question 101 Point
11. Question 111 Point
12. Question 121 Point
13. Question 131 Point
14. Question 141 Point
15. Question 151 Point

What type of correlation would you expect from the following variables: test scores and shoe sizes?

Negative Correlation

Positive Correlation

Nonlinear Correlation

No Correlation

A restaurant sells pizza at a price determined by the number of toppings. If the linear regression equation can be represented by y = 12 + 1.5x, determine the price of a pizza if you order 8 toppings. Assume that this is a good model.

$24

$8

$12

$22

When comparing two variables, you calculate r = -0.76 and find the CV = 0.586. What should your conclusion be when running a hypothesis test for linear correlation?

There is no sufficient evidence to support the claim of a linear correlation.

There is sufficient evidence to support the claim of a linear correlation.

There may or may not be a linear correlation between the two variables.

There is sufficient evidence to support the claim of a non-linear correlation.

Describe the correlation associated with the scatter plot below.

Positive, strong

Positive, weak

Negative, strong

Negative, weak

When would you need to use the average of the y-values to make a prediction instead of the regression line?

The r value indicates there is not a linear correlation between the variables.

The prediction is not far outside of the scope of the available data.

The points on the scatterplot closely fit the regression line when graphed.

The y-values are closely grouped together in the range.

A correlation shows that two variables are ____________.

Related

Unrelated

Causing each other

Linearly related

Which of the following values of r is the WEAKEST negative correlation?

r = -0.95

r = -0.72

r = -0.32

r = -0.51

If Andrew works 40 hours, how much is he expected to earn based on the scatterplot which represents his pay below?

$600

$1000

$700

$400

The annual profits for a company are given in the following table, where x represents the number of years since 2010, and y represents the profit in thousands of dollars. Determine the linear regression equation that represents this set of data, rounding all coefficients to the nearest hundredth.

y = 134.4 + 22.8x

y = 22.8 + 134.4x

y = -3.005 + 0.0278x

y = 0.0278 - 3.005x

Data is analyzed comparing hours studied and grades. It is determined that the correlation coefficient is 0.87. What type of correlation exists between these two variables?

Strong positive correlation

Strong negative correlation

Weak positive correlation

No correlation

If a set of variables both change in the same direction when graphed, what type of correlation would best represent the correlation?

Negative Correlation

Positive Correlation

Nonlinear Correlation

No Correlation

Which of the following is NOT a reason why we use a scatterplot to graph correlation?

The dots reveal the direction of change in the variables.

The dots reveal how spread out the data is from the line which approximates the data.

The dots illustrate various degrees of correlation.

The dots calculate the linear correlation value, r.

Which Excel formula calculates the linear correlation coefficient r?

CORREL

AVERAGE

T.INV

R.COEF

What type of correlation would you expect from the following variables: the number of hours you studied and your grade?

Negative Correlation

Positive Correlation

Nonlinear Correlation

No Correlation

Which variable is used to represent the predictor variable?

x

y

r

p

1. Question 151 Point

What type of correlation would you expect from the following variables: test scores and shoe sizes?

Negative Correlation

Positive Correlation

Nonlinear Correlation

No Correlation

1. Question 151 Point

What type of correlation would you expect from the following variables: test scores and shoe sizes?

Negative Correlation

Positive Correlation

Nonlinear Correlation

No Correlation