Question 1

In the regression equation,what does the letter X represent?

Accepted Answer

A) The Y-intercept 
B) The slope of the line 
C) The independent variable 
D) The dependent variable 
A) The Y-intercept 
B) The slope of the line 
C) The independent variable 
D) The dependent variable

Question 2

Using the following information:     Estimate the value of   when X = 4.

Accepted Answer

A) 10.45 
B) 3.73 
C) 8.718 
D) −4.092 
A) 10.45 
B) 3.73 
C) 8.718 
D) −4.092

Question 3

One assumption underlying linear regression is that the X values are normally distributed.

Accepted Answer

A) True 
 B)False

Question 4

Consider the following regression analysis between sales (Y in $1,000)and social media advertising (X in dollars).   = 55,000 + 7X The regression equation implies that an ________.

Accepted Answer

A) increase of $7 in advertising is associated with an increase of $7,000 in sales 
B) increase of $1 in advertising is associated with an increase of $7 in sales 
C) increase of $1 in advertising is associated with an increase of $62,000 in sales 
D) increase of $1 in advertising is associated with an increase of $7,000 in sales 
A) increase of $7 in advertising is associated with an increase of $7,000 in sales 
B) increase of $1 in advertising is associated with an increase of $7 in sales 
C) increase of $1 in advertising is associated with an increase of $62,000 in sales 
D) increase of $1 in advertising is associated with an increase of $7,000 in sales

Question 5

A sales manager for an advertising agency believes 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:       = 33.4.   = 2814.4. Rounding to one decimal place,the 95% confidence interval for 30 calls is ________.

Accepted Answer

A) 55.8,51.5 
B) 51.4,55.9 
C) 46.7,60.6 
D) 31.1,76.2 
A) 55.8,51.5 
B) 51.4,55.9 
C) 46.7,60.6 
D) 31.1,76.2

Question 6

A sales manager for an advertising agency believes 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 standard error of estimate?

Accepted Answer

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

Question 7

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 8

In the regression equation,what does the letter b represent?

Accepted Answer

A) The Y-intercept 
B) The slope of the line 
C) Any value of the independent variable that is selected 
D) The value of Y when X = 0 
A) The Y-intercept 
B) The slope of the line 
C) Any value of the independent variable that is selected 
D) The value of Y when X = 0

Question 9

If the coefficient of determination is 0.94,what can we say about the relationship between two variables?

Accepted Answer

A) The strength of the relationship is 0.94. 
B) The direction of the relationship is positive. 
C) Ninety-four percent of the total variation of the dependent variable is explained by the independent variable. 
D) The direction of the relationship is negative. 
A) The strength of the relationship is 0.94. 
B) The direction of the relationship is positive. 
C) Ninety-four percent of the total variation of the dependent variable is explained by the independent variable. 
D) The direction of the relationship is negative.

Question 10

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 11

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) z = +3.707 
C) t = +3.355 
D) t = ±3.707 
A) z = +2.576 
B) z = +3.707 
C) t = +3.355 
D) t = ±3.707

Question 12

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 13

Assume the least squares equation is   = 10 + 20X. What does the value of 10 in the equation indicate?

Accepted Answer

A) When X = 0,Y = 10. 
B) X increases by 10 for each unit increase in Y. 
C) Y increases by 10 for each unit increase in X. 
D) It is the error of estimation. 
A) When X = 0,Y = 10. 
B) X increases by 10 for each unit increase in Y. 
C) Y increases by 10 for each unit increase in X. 
D) It is the error of estimation.

Question 14

A sales manager for an advertising agency believes 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 15

In the regression equation,what does the letter Y represent?

Accepted Answer

A) The Y-intercept 
B) The slope of the line 
C) The independent variable 
D) The dependent variable 
A) The Y-intercept 
B) The slope of the line 
C) The independent variable 
D) The dependent variable

Question 16

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 17

A sales manager for an advertising agency believes 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 correlation?

Accepted Answer

A) +0.6317 
B) +0.9754 
C) −0.9754 
D) +0.9513 
A) +0.6317 
B) +0.9754 
C) −0.9754 
D) +0.9513

Question 18

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 19

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

Accepted Answer

A) True 
 B)False

Question 20

Based on the regression equation,we can ________.

Accepted Answer

A) predict the value of the dependent variable given a value of the independent variable 
B) predict the value of the independent variable given a value of the dependent variable 
C) measure the association between two variables 
D) measure cause and effect 
A) predict the value of the dependent variable given a value of the independent variable 
B) predict the value of the independent variable given a value of the dependent variable 
C) measure the association between two variables 
D) measure cause and effect

In the regression equation,what does the letter X represent?

Using the following information: Estimate the value of when X = 4.

One assumption underlying linear regression is that the X values are normally distributed.

Consider the following regression analysis between sales (Y in $1,000)and social media advertising (X in dollars). = 55,000 + 7X The regression equation implies that an ________.

A sales manager for an advertising agency believes 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 standard error of estimate?

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

In the regression equation,what does the letter b represent?

If the coefficient of determination is 0.94,what can we say about the relationship between two variables?

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

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?

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

Assume the least squares equation is = 10 + 20X. What does the value of 10 in the equation indicate?

A sales manager for an advertising agency believes 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?

In the regression equation,what does the letter Y represent?

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

A sales manager for an advertising agency believes 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 correlation?

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

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

Based on the regression equation,we can ________.

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: Nominal Level Hypothesis Tests

Nonparametric Methods: Analysis of Ordinal Data

Index Numbers

Time Series and Forecasting

Statistical Process Control and Quality Management

An Introduction to Decision Theory

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Exam 13: Correlation and Linear Regression

In the regression equation,what does the letter X represent?

Using the following information: Estimate the value of when X = 4.

One assumption underlying linear regression is that the X values are normally distributed.

Consider the following regression analysis between sales (Y in $1,000)and social media advertising (X in dollars). = 55,000 + 7X The regression equation implies that an ________.

A sales manager for an advertising agency believes 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 standard error of estimate?

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

In the regression equation,what does the letter b represent?

If the coefficient of determination is 0.94,what can we say about the relationship between two variables?

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

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?

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

Assume the least squares equation is = 10 + 20X. What does the value of 10 in the equation indicate?

A sales manager for an advertising agency believes 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?

In the regression equation,what does the letter Y represent?

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

A sales manager for an advertising agency believes 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 correlation?

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

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

Based on the regression equation,we can ________.

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: Nominal Level Hypothesis Tests

Nonparametric Methods: Analysis of Ordinal Data

Index Numbers

Time Series and Forecasting

Statistical Process Control and Quality Management

An Introduction to Decision Theory

Filters