Question 1

Using the following regression analysis.   What is the coefficient of determination?

Accepted Answer

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

Question 2

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 slope of the linear equation? ________________

Accepted Answer

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

Question 3

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 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 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 independent variable (X)? _________________

Accepted Answer

Length of

Question 5

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 analysis shows the following results:   What is the regression equation?

Accepted Answer

A)    = 2.195 - 12.201X 
B)    = -12.201 + 2.195X 
C)    = 12.201 + 2.195X 
D)    = 2.1946 + 12.201X 
A)    = 2.195 - 12.201X 
B)    = -12.201 + 2.195X 
C)    = 12.201 + 2.195X 
D)    = 2.1946 + 12.201X

Question 6

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

Accepted Answer

A)  H0: $\beta$ = 0 
B)  H0: $\beta$ $\neq$ 0 
C)  H0: $\beta$$\le$ 0 
D)  H0: $\beta$$\ge$ 
A)  H0: $\beta$ = 0 
B)  H0: $\beta$ $\neq$ 0 
C)  H0: $\beta$$\le$ 0 
D)  H0: $\beta$$\ge$

Question 7

High school students were interested in a teacher's claim that 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 8

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 9

If we reject the null hypothesis that tests a population correlation coefficient, what can we conclude about the correlation in the population?

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 10

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

Accepted Answer

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

Question 11

High school students were interested in a teacher's claim that 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.   To test the null hypothesis that no relationship exists between study time and score, what are the F-test statistic and the F-critical value using the 0.05 significance level?

Accepted Answer

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

Question 12

The standard error of the estimate measures the scatter or dispersion of the observed values around a ___________________.

Accepted Answer

The answer of The standard error of the estimate measures...

Question 13

If all the plots on a scatter diagram lie on a straight line, what is the standard error of estimate?

Accepted Answer

A)  -1 
B)  +1 
C)  0 
D)  Infinity 
A)  -1 
B)  +1 
C)  0 
D)  Infinity

Question 14

Approximately what percent of the values lie within two standard errors of the regression line? ________

Accepted Answer

The answer of Approximately what percent of the values lie...

Question 15

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

Accepted Answer

A)  z-statistic 
B)  F-statistic 
C)  t-statistic 
D)  $\pi$-statistic 
A)  z-statistic 
B)  F-statistic 
C)  t-statistic 
D)  $\pi$-statistic

Question 16

What does a coefficient of correlation of 0.70 infer?

Accepted Answer

A)  Almost no correlation because 0.70 is close to 1.0 
B)  70% of the variation in one variable is explained by the other 
C)  Coefficient of determination is 0.49 
D)  Coefficient of nondetermination is 0.30 
A)  Almost no correlation because 0.70 is close to 1.0 
B)  70% of the variation in one variable is explained by the other 
C)  Coefficient of determination is 0.49 
D)  Coefficient of nondetermination is 0.30

Question 17

In the regression equation, what does the letter "a" represent?

Accepted Answer

A)  Y intercept 
B)  Slope of the line 
C)  Any value of the independent variable that is selected 
D)  Error 
A)  Y intercept 
B)  Slope of the line 
C)  Any value of the independent variable that is selected 
D)  Error

Question 18

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

Accepted Answer

A) True 
 B)False

Question 19

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 20

What is the range of values that the coefficient of determination can assume? _____ and ______

Accepted Answer

The answer of What is the range of values that...

Using the following regression analysis. What is 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 slope of the linear equation? ________________

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 analysis shows the following results: What is the standard error of the slope?

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 independent variable (X)? _________________

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 analysis shows the following results: What is the regression equation?

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

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

If we reject the null hypothesis that tests a population correlation coefficient, what can we conclude about the correlation in the population?

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

The standard error of the estimate measures the scatter or dispersion of the observed values around a ___________________.

If all the plots on a scatter diagram lie on a straight line, what is the standard error of estimate?

Approximately what percent of the values lie within two standard errors of the regression line? ________

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

What does a coefficient of correlation of 0.70 infer?

In the regression equation, what does the letter "a" represent?

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

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.

What is the range of values that the coefficient of determination can assume? _ and __

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

Index Numbers

Time Series and Forecasting

Nonparametric Methods: Goodness-Of-Fit Tests

Nonparametric Methods: Analysis of Ranked Data

Statistical Process Control and Quality Management

An Introduction to Decision Theory

Filters

Exam 13: Correlation and Linear Regression

Using the following regression analysis. What is 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 slope of the linear equation? ________________

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 analysis shows the following results: What is the standard error of the slope?

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 independent variable (X)? _________________

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 analysis shows the following results: What is the regression equation?

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

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

If we reject the null hypothesis that tests a population correlation coefficient, what can we conclude about the correlation in the population?

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

The standard error of the estimate measures the scatter or dispersion of the observed values around a ___________________.

If all the plots on a scatter diagram lie on a straight line, what is the standard error of estimate?

Approximately what percent of the values lie within two standard errors of the regression line? ________

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

What does a coefficient of correlation of 0.70 infer?

In the regression equation, what does the letter "a" represent?

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

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.

What is the range of values that the coefficient of determination can assume? _____ and ______

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

Index Numbers

Time Series and Forecasting

Nonparametric Methods: Goodness-Of-Fit Tests

Nonparametric Methods: Analysis of Ranked Data

Statistical Process Control and Quality Management

An Introduction to Decision Theory

Filters

What is the range of values that the coefficient of determination can assume? _ and __