Question 1

If the coefficient of determination is 0.81, the coefficient of correlation is _____.

Accepted Answer

The answer of If the coefficient of determination is 0.81,...

Question 2

A chart that shows the relationship between a continuous dependent variable and a continuous independent variable is called a ____________.

Accepted Answer

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

Question 3

What is the null hypothesis to test the significance of the slope in a regression equation?

Accepted Answer

A) H0: β = 0 
B) H0: β ≠ 0 
C) H0: β ≤ 0 
D) H0: β ≥ 0 
A) H0: β = 0 
B) H0: β ≠ 0 
C) H0: β ≤ 0 
D) H0: β ≥ 0

Question 4

Given the least squares regression equation, Ŷ = 1,202 + 1,133X, when X = 3, what does Ŷ equal?

Accepted Answer

A) 5,734 
B) 8,000 
C) 4,601 
D) 4,050 
A) 5,734 
B) 8,000 
C) 4,601 
D) 4,050

Question 5

The general form of the regression equation is ____________.

Accepted Answer

The answer of The general form of the regression equation...

Question 6

A scatter diagram is a graph that portrays the correlation between a dependent variable and an independent variable.

Accepted Answer

A) True 
 B)False

Question 7

What is the purpose of measuring correlation?

Accepted Answer

To provide a measure

Question 8

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

Question 9

The regression equation is Ŷ = 30 + 2.56X, the sample size is 14, and the standard error of the slope is 0.97. What is the critical value to test the significance of the slope at the 0.05 significance level?

Accepted Answer

A) z = ±1.96 
B) t = ±2.179 
C) t = ±2.145 
D) t = +2.145 
A) z = ±1.96 
B) t = ±2.179 
C) t = ±2.145 
D) t = +2.145

Question 10

The values of a and b in the regression equation are called the regression coefficients.

Accepted Answer

A) True 
 B)False

Question 11

The regression equation is used to estimate a value of the dependent variable Y based on a selected value of the independent variable X.

Accepted Answer

A) True 
 B)False

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 analysis shows the following results:   What is the slope of the linear equation?

Accepted Answer

A) -12.201 
B) 2.195 
C) -1.860 
D) 12.505 
A) -12.201 
B) 2.195 
C) -1.860 
D) 12.505

Question 13

In regression, the difference between the confidence interval and prediction interval formulas is ________________.

Accepted Answer

A) The prediction interval is the square root of the confidence interval 
B) The addition of "1" to the quantity under the radical sign 
C) The prediction interval uses r2 and the confidence interval uses r 
D) No difference 
A) The prediction interval is the square root of the confidence interval 
B) The addition of "1" to the quantity under the radical sign 
C) The prediction interval uses r2 and the confidence interval uses r 
D) No difference

Question 14

An economist is interested in predicting the unemployment rate based on gross domestic product. Since the economist is interested in predicting unemployment, the independent variable is gross domestic product.

Accepted Answer

A) True 
 B)False

Question 15

The regression equation is Ŷ = 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 = ±3.707 
A) z = +2.576 
B) t = +3.707 
C) t = +3.355 
D) t = ±3.707

Question 16

Which of the following are the same between a confidence interval and a prediction interval?

Accepted Answer

A) The formulas are the same. 
B) They both use the standard error of estimate. 
C) They both provide a confidence interval for the mean. 
D) A confidence interval and prediction interval are the same width. 
A) The formulas are the same. 
B) They both use the standard error of estimate. 
C) They both provide a confidence interval for the mean. 
D) A confidence interval and prediction interval are the same width.

Question 17

The Pearson product-moment correlation coefficient, r, requires that variables be measured with _____________.

Accepted Answer

A) An interval or ratio scale. 
B) An ordinal or ratio scale. 
C) A nominal or ordinal scale. 
D) A nominal or ratio scale. 
A) An interval or ratio scale. 
B) An ordinal or ratio scale. 
C) A nominal or ordinal scale. 
D) A nominal or ratio scale.

Question 18

What are the degrees of freedom used to test the significance of the slope in a simple linear regression equation?

Accepted Answer

A) n - 1 
B) n - 2 
C) n - 1, n - 2 
D) (n - 1)(n - 2) 
A) n - 1 
B) n - 2 
C) n - 1, n - 2 
D) (n - 1)(n - 2)

Question 19

If there is perfect correlation, the value of the correlation coefficient is __________.

Accepted Answer

The answer of If there is perfect correlation, the value...

Question 20

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

Accepted Answer

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

If the coefficient of determination is 0.81, the coefficient of correlation is _____.

A chart that shows the relationship between a continuous dependent variable and a continuous independent variable is called a ____________.

What is the null hypothesis to test the significance of the slope in a regression equation?

Given the least squares regression equation, Ŷ = 1,202 + 1,133X, when X = 3, what does Ŷ equal?

The general form of the regression equation is ____________.

A scatter diagram is a graph that portrays the correlation between a dependent variable and an independent variable.

What is the purpose of measuring correlation?

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

The regression equation is Ŷ = 30 + 2.56X, the sample size is 14, and the standard error of the slope is 0.97. What is the critical value to test the significance of the slope at the 0.05 significance level?

The values of a and b in the regression equation are called the regression coefficients.

The regression equation is used to estimate a value of the dependent variable Y based on a selected value of the independent variable X.

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 slope of the linear equation?

In regression, the difference between the confidence interval and prediction interval formulas is ________________.

An economist is interested in predicting the unemployment rate based on gross domestic product. Since the economist is interested in predicting unemployment, the independent variable is gross domestic product.

The regression equation is Ŷ = 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?

Which of the following are the same between a confidence interval and a prediction interval?

The Pearson product-moment correlation coefficient, r, requires that variables be measured with _____________.

What are the degrees of freedom used to test the significance of the slope in a simple linear regression equation?

If there is perfect correlation, the value of the correlation coefficient is __________.

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

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

If the coefficient of determination is 0.81, the coefficient of correlation is _____.

A chart that shows the relationship between a continuous dependent variable and a continuous independent variable is called a ____________.

What is the null hypothesis to test the significance of the slope in a regression equation?

Given the least squares regression equation, Ŷ = 1,202 + 1,133X, when X = 3, what does Ŷ equal?

The general form of the regression equation is ____________.

A scatter diagram is a graph that portrays the correlation between a dependent variable and an independent variable.

What is the purpose of measuring correlation?

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

The regression equation is Ŷ = 30 + 2.56X, the sample size is 14, and the standard error of the slope is 0.97. What is the critical value to test the significance of the slope at the 0.05 significance level?

The values of a and b in the regression equation are called the regression coefficients.

The regression equation is used to estimate a value of the dependent variable Y based on a selected value of the independent variable X.

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 slope of the linear equation?

In regression, the difference between the confidence interval and prediction interval formulas is ________________.

An economist is interested in predicting the unemployment rate based on gross domestic product. Since the economist is interested in predicting unemployment, the independent variable is gross domestic product.

The regression equation is Ŷ = 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?

Which of the following are the same between a confidence interval and a prediction interval?

The Pearson product-moment correlation coefficient, r, requires that variables be measured with _____________.

What are the degrees of freedom used to test the significance of the slope in a simple linear regression equation?

If there is perfect correlation, the value of the correlation coefficient is __________.

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

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