Question 1

The standard error of estimate measures the accuracy of a prediction.

Accepted Answer

A) True 
 B)False

Question 2

If the slope of a regression line is zero, the orientation of the regression line is _________, which indicates a lack of a relationship.

Accepted Answer

The answer of If the slope of a regression line...

Question 3

High school students were interested in a teacher's claim that the longer the length of time (hours) that a student studies for a test, the higher the test score. The students collected the data and the teacher did the regression analysis with the following results.   If a student studies 10 hours, what is the predicted score?

Accepted Answer

The answer of High school students were interested in a...

Question 4

A company wants to study the effect of an employee's length of employment on their number of workdays absent. The company collected the following information on a random sample of seven employees.   What is the dependent variable (Y)?

Accepted Answer

Number of

Question 5

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

Question 6

Which of the following is true about the standard error of estimate?

Accepted Answer

A) It is a measure of the accuracy of the prediction. 
B) It is based on squared vertical deviations between Y and X. 
C) It can be negative. 
D) It is calculated using the regression mean square. 
A) It is a measure of the accuracy of the prediction. 
B) It is based on squared vertical deviations between Y and X. 
C) It can be negative. 
D) It is calculated using the regression mean square.

Question 7

The coefficient of determination is the proportion of total variation in Y that is explained by X.

Accepted Answer

A) True 
 B)False

Question 8

If we reject the null hypothesis, H0:   , what can we conclude about the population correlation coefficient?

Accepted Answer

A) It is zero. 
B) It could be zero. 
C) It is not zero. 
D) It equals the computed sample correlation. 
A) It is zero. 
B) It could be zero. 
C) It is not zero. 
D) It equals the computed sample correlation.

Question 9

Approximately ______% of the observations lies within two standard errors of the regression line.

Accepted Answer

The answer of Approximately ______% of the observations lies within...

Question 10

Using the following information:   What is the correlation coefficient?

Accepted Answer

A) 0.9184 
B) 0.9583 
C) -0.9583 
D) 0.9004 
A) 0.9184 
B) 0.9583 
C) -0.9583 
D) 0.9004

Question 11

Using the following regression analysis:   What is the regression mean square?

Accepted Answer

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

Question 12

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

Accepted Answer

A) -0.9513 
B) 0.9754 
C) 0.6319 
D) 0.9513 
A) -0.9513 
B) 0.9754 
C) 0.6319 
D) 0.9513

Question 13

What is the range of values for the coefficient of determination?

Accepted Answer

A) -1 to +1 inclusive 
B) -100% to +100% inclusive 
C) -100% to 0% inclusive 
D) 0% to 100% inclusive 
A) -1 to +1 inclusive 
B) -100% to +100% inclusive 
C) -100% to 0% inclusive 
D) 0% to 100% inclusive

Question 14

A sales manager for an advertising agency believes that there is a relationship between the number of contacts that a salesperson makes and the amount of sales dollars earned. A regression analysis shows the following results:   What is the decision regarding the hypothesis that the slope equals zero?

Accepted Answer

A) Fail to reject the null hypothesis. 
B) Fail to reject the alternative hypothesis. 
C) Reject the null hypothesis. 
D) Reject the alternative hypothesis. 
A) Fail to reject the null hypothesis. 
B) Fail to reject the alternative hypothesis. 
C) Reject the null hypothesis. 
D) Reject the alternative hypothesis.

Question 15

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 Y-intercept of the linear equation?

Accepted Answer

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

Question 16

In plotting paired data in a scatter diagram, the dependent variable is scaled on the __________________.

Accepted Answer

The answer of In plotting paired data in a scatter...

Question 17

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

Accepted Answer

A) 0.176 
B) 6.560 
C) -12.201 
D) 12.505 
A) 0.176 
B) 6.560 
C) -12.201 
D) 12.505

Question 18

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

Accepted Answer

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

Question 19

A regression analysis yields the following information:   ; n = 10; sy∙x = 1.66; ΣX = 32; ΣX2 = 134;   Compute the 95% prediction interval when X = 4.

Accepted Answer

A) 0.0, 4.05 
B) 2.67, 5.33 
C) 4.118, 12.226 
D) 6.873, 9.527 
A) 0.0, 4.05 
B) 2.67, 5.33 
C) 4.118, 12.226 
D) 6.873, 9.527

Question 20

The relationship between interest rates as a percent (X) and housing starts (Y) is given by the linear equation Ŷ = 4094 - 269X. What will be the number of housing starts if the interest rate is 8.25%?

Accepted Answer

1875, roun

The standard error of estimate measures the accuracy of a prediction.

If the slope of a regression line is zero, the orientation of the regression line is _________, which indicates a lack of a relationship.

A company wants to study the effect of an employee's length of employment on their number of workdays absent. The company collected the following information on a random sample of seven employees. What is the dependent variable (Y)?

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

Which of the following is true about the standard error of estimate?

The coefficient of determination is the proportion of total variation in Y that is explained by X.

If we reject the null hypothesis, H₀: , what can we conclude about the population correlation coefficient?

Approximately ______% of the observations lies within two standard errors of the regression line.

Using the following information: What is the correlation coefficient?

Using the following regression analysis: What is the regression mean square?

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

What is the range of values for the coefficient of determination?

A sales manager for an advertising agency believes that there is a relationship between the number of contacts that a salesperson makes and the amount of sales dollars earned. A regression analysis shows the following results: What is the decision regarding the hypothesis that the slope equals zero?

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 Y-intercept of the linear equation?

In plotting paired data in a scatter diagram, the dependent variable is scaled on the __________________.

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

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

A regression analysis yields the following information: ; n = 10; s_y∙x = 1.66; ΣX = 32; ΣX² = 134; Compute the 95% prediction interval when X = 4.

The relationship between interest rates as a percent (X) and housing starts (Y) is given by the linear equation Ŷ = 4094 - 269X. What will be the number of housing starts if the interest rate is 8.25%?

What Is Statistics

Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation

Describing Data: Numerical Measures

Describing Data: Displaying and Exploring Data

A Survey of Probability Concepts

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Methods and the Central Limit Theorem

Estimation and Confidence Intervals

One-Sample Tests of Hypothesis

Two-Sample Tests of Hypothesis

Analysis of Variance

Multiple Regression Analysis

Nonparametric Methods: Goodness-Of-Fit Tests

Filters

Exam 13: Correlation and Linear Regression

The standard error of estimate measures the accuracy of a prediction.

If the slope of a regression line is zero, the orientation of the regression line is _________, which indicates a lack of a relationship.

A company wants to study the effect of an employee's length of employment on their number of workdays absent. The company collected the following information on a random sample of seven employees. What is the dependent variable (Y)?

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

Which of the following is true about the standard error of estimate?

The coefficient of determination is the proportion of total variation in Y that is explained by X.

If we reject the null hypothesis, H0: , what can we conclude about the population correlation coefficient?

Approximately ______% of the observations lies within two standard errors of the regression line.

Using the following information: What is the correlation coefficient?

Using the following regression analysis: What is the regression mean square?

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

What is the range of values for the coefficient of determination?

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 Y-intercept of the linear equation?

In plotting paired data in a scatter diagram, the dependent variable is scaled on the __________________.

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

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

A regression analysis yields the following information: ; n = 10; sy∙x = 1.66; ΣX = 32; ΣX2 = 134; Compute the 95% prediction interval when X = 4.

The relationship between interest rates as a percent (X) and housing starts (Y) is given by the linear equation Ŷ = 4094 - 269X. What will be the number of housing starts if the interest rate is 8.25%?

What Is Statistics

Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation

Describing Data: Numerical Measures

Describing Data: Displaying and Exploring Data

A Survey of Probability Concepts

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Methods and the Central Limit Theorem

Estimation and Confidence Intervals

One-Sample Tests of Hypothesis

Two-Sample Tests of Hypothesis

Analysis of Variance

Multiple Regression Analysis

Nonparametric Methods: Goodness-Of-Fit Tests

Filters

If we reject the null hypothesis, H₀: , what can we conclude about the population correlation coefficient?

A regression analysis yields the following information: ; n = 10; s_y∙x = 1.66; ΣX = 32; ΣX² = 134; Compute the 95% prediction interval when X = 4.