Question 1

A chart that shows the relationship between a dependent variable and an independent variable is called a ______________________.

Accepted Answer

The answer of A chart that shows the relationship between...

Question 2

What is the chart called when the paired data (the dependent and independent variables) are plotted?

Accepted Answer

A)  Scatter diagram 
B)  Bar chart 
C)  Pie chart 
D)  Histogram

Question 3

A company wants to study the effect of an employee's length of employment on their number of workdays absent. The results of the regression analysis follow.  What is the meaning of a negative slope? _________________________

Accepted Answer

The answer of A company wants to study the effect...

Question 4

A sales manager for an advertising agency believes that there is a relationship between the number of contacts that a sales person makes and the amount of the sales dollars earned. A regression ANOVA shows the following results:  What is the value of the standard error of estimate?

Accepted Answer

A)  9.310 
B)  8.778 
C)  8.328 
D)  86.68

Question 5

Using the following information:   What is the standard error of the estimate?

Accepted Answer

A)  136.8552 
B)  1094.842 
C)  11.6985 
D)  13418.4

Question 6

What is the purpose of transformations in regression analysis?

Accepted Answer

The answer of What is the purpose of transformations in...

Question 7

Correlation analysis is a statistical technique used to measure the strength of the relationship between two variables.

Accepted Answer

A) True 
 B)False

Question 8

If the correlation between sales and advertising is +0.6, what percent of the variation in sales can be attributed to advertising? ______

Accepted Answer

The answer of If the correlation between sales and advertising...

Question 9

What does the coefficient of determination equal if r = 0.89?

Accepted Answer

A)  0.9412 
B)  0.0121 
C)  0.7921 
D)  0.1100

Question 10

What do the coefficient of correlation and the slope of the regression line always have in common? __________________

Accepted Answer

The answer of What do the coefficient of correlation and...

Question 11

The least squares technique minimizes the sum of the squares of the vertical distances between the actual Y values and the predicted values of Y.

Accepted Answer

A) True 
 B)False

Question 12

If r = 0.65, what does the coefficient of determination equal?

Accepted Answer

A)  0.1945 
B)  0.4225 
C)  0.5778 
D)  0.8061

Question 13

Perfect correlation means that the scatter diagram will appear as a _____________________.

Accepted Answer

The answer of Perfect correlation means that the scatter diagram...

Question 14

The regression equation is ? = 29.29 - 0.96X, the sample size is 8, and the standard error of the slope is 0.22. What is the critical value to test the significance of the slope at the 0.01 significance level?

Accepted Answer

A)  z = 2.576 
B)  t = 3.707 
C)  t = 3.355 
D)  t = $\pm$ 3.707

Question 15

The relationship between interest rates as a percent (X) and housing starts (Y) is given by the linear equation Ŷ = 4094 - 269X. For what interest rate will the maximum number of housing starts be achieved? _______

Accepted Answer

The answer of The relationship between interest rates as a...

Question 16

Select a value for the correlation coefficient and provide a complete interpretation of the correlation coefficient using your selected value.

Accepted Answer

The answer of Select a value for the correlation coefficient...

Question 17

Using the following regression analysis.  What is the F-statistic for the ANOVA?

Accepted Answer

The answer of Using the following regression analysis.  What...

Question 18

Using the following information:   What is the correlation coefficient?

Accepted Answer

A)  0.81 
B)  0.958 
C)  - 0.958 
D)  0.9004

Question 19

The relationship between interest rates as a percent (X) and housing starts (Y) is given by the linear equation Ŷ = 4094 - 269X.
At what interest rate will there be no permits for housing starts? _________

Accepted Answer

The answer of The relationship between interest rates as a...

Question 20

Using the following information:   What is the coefficient of determination?

Accepted Answer

A)  91.8% 
B)  8.2% 
C)  90.0% 
D)  136.8552

Exam 13: Correlation and Linear Regression

A chart that shows the relationship between a dependent variable and an independent variable is called a ______________________.

What is the chart called when the paired data (the dependent and independent variables) are plotted?

A company wants to study the effect of an employee's length of employment on their number of workdays absent. The results of the regression analysis follow. What is the meaning of a negative slope? _________________________

A sales manager for an advertising agency believes that there is a relationship between the number of contacts that a sales person makes and the amount of the sales dollars earned. A regression ANOVA shows the following results: What is the value of the standard error of estimate?

Using the following information: What is the standard error of the estimate?