Question 1

The r² statistic measures the proportion of variation in one variable that is explained by the other.

Accepted Answer

A) True 
 B)False

Question 2

The term used to denote the standardized regression coefficient is called the ________.

Accepted Answer

A)   alpha coefficient
B)   beta coefficient
C)   gamma coefficient
D)   theta coefficient
E)   pi coefficientF) D) and E)
G) A) and B)

Question 3

A scatter diagram is a plot of the values of two variables for all the cases or observations.

Accepted Answer

A) True 
 B)False

Question 4

A statistic summarizing the strength of association between two metric variables is called the ________.

Accepted Answer

A)   product moment correlation
B)   covariance correlation
C)   inverse correlation
D)   bivariate correlation
E)   F-statisticF) C) and E)
G) A) and B)

Question 5

The standardized regression coefficient is the slope obtained by the regression of y on x when the data are standardized.

Accepted Answer

A) True 
 B)False

Question 6

The process by which the raw data are transformed into new variables that have a mean of 0 and a variance of 1 is called ________.

Accepted Answer

A)   standardization
B)   covariance
C)   correlation
D)   regression
E)   analysis of varianceF) B) and D)
G) C) and E)

Question 7

In a short essay, define regression analysis and discuss at least four ways in which regression analysis can be used.

Accepted Answer

Regression analysis is a powerful and fl...

Question 8

Regression analysis of an independent and dependent variable can be used in all of the following ways EXCEPT:

Accepted Answer

A)   determining whether a relationship exists.
B)   assessing the strength of relationship.
C)   determining the structure or form of the relationship.
D)   predicting values of the dependent variable.
E)   determining causality.F) A) and B)
G) C) and E)

Question 9

The ________ coefficient is the slope obtained by the regression of y on x when the data are standardized.

Accepted Answer

A)   random regression
B)   standardized regression
C)   bipolar regression
D)   alternate regression
E)   alphaF) C) and E)
G) B) and E)

Question 10

It is not possible to conduct correlation and regression analysis if the data collected in social media are qualitative in nature.

Accepted Answer

A) True 
 B)False

Question 11

The correlation coefficient between two variables varies depending on their underlying units of measurement.

Accepted Answer

A) True 
 B)False

Question 12

The most commonly used technique for fitting a straight line to a scattergram is the ________.

Accepted Answer

A)   most-squares procedure
B)   analysis of variance
C)   least-squares procedure
D)   correlation equation
E)   sum of squared errorsF) B) and C)
G) All of the above

Question 13

The term used to denote the standardized regression coefficient is called the alpha coefficient.

Accepted Answer

A) True 
 B)False

Question 14

In a short essay, discuss multiple regression and the multiple regression model.

Accepted Answer

Multiple regression is a statistical tec...

Question 15

The best fitting line on a scattergram is called the ________.

Accepted Answer

A)   regression line
B)   correlation coefficient
C)   covariance
D)   standard error
E)   plumb lineF) B) and E)
G) D) and E) A

Question 16

The distances for all the points from the regression line are squared and added together to arrive at the sum of the squared errors, which is a measure of total error.

Accepted Answer

A) True 
 B)False

Question 17

The null hypothesis in bivariate regression is ________.

Accepted Answer

A)   Bᵧₓ = Bₓᵧ = rₓᵧ
B)   B = Covₓᵧ / sₓ²
C)   sₓ = xmₑₐn
D)   a = xy
E)   B₁ = 0F) B) and D)
G) None of the above E

Question 18

________ involves a single dependent variable and two or more independent variables.

Accepted Answer

A)   Analysis of variance
B)   Factor analysis
C)   Correlation analysis
D)   Multiple regression
E)   Canonical correlationF) A) and E)
G) B) and D) D

Question 19

The difference between the observed value of Y and the value predicted by the regression equation is called the standard error.

Accepted Answer

A) True 
 B)False

Question 20

According to the text, the beta coefficient is also called the beta weight.

Accepted Answer

A) True 
 B)False

Exam 18: Correlation and Regression

The r² statistic measures the proportion of variation in one variable that is explained by the other.

Correct AnswerverifiedShow Answer

The term used to denote the standardized regression coefficient is called the ________.

Correct AnswerverifiedShow Answer

A scatter diagram is a plot of the values of two variables for all the cases or observations.

Correct AnswerverifiedShow Answer

A statistic summarizing the strength of association between two metric variables is called the ________.

Correct AnswerverifiedShow Answer

The standardized regression coefficient is the slope obtained by the regression of y on x when the data are standardized.

Correct AnswerverifiedShow Answer

The process by which the raw data are transformed into new variables that have a mean of 0 and a variance of 1 is called ________.

Correct AnswerverifiedShow Answer

In a short essay, define regression analysis and discuss at least four ways in which regression analysis can be used.

Correct AnswerverifiedRegression analysis is a powerful and fl...View AnswerShow Answer

Regression analysis of an independent and dependent variable can be used in all of the following ways EXCEPT:

Correct AnswerverifiedShow Answer

The ________ coefficient is the slope obtained by the regression of y on x when the data are standardized.

Correct AnswerverifiedShow Answer

It is not possible to conduct correlation and regression analysis if the data collected in social media are qualitative in nature.

Correct AnswerverifiedShow Answer

The correlation coefficient between two variables varies depending on their underlying units of measurement.

Correct AnswerverifiedShow Answer

The most commonly used technique for fitting a straight line to a scattergram is the ________.

Correct AnswerverifiedShow Answer

The term used to denote the standardized regression coefficient is called the alpha coefficient.

Correct AnswerverifiedShow Answer

In a short essay, discuss multiple regression and the multiple regression model.

Correct AnswerverifiedMultiple regression is a statistical tec...View AnswerShow Answer

The best fitting line on a scattergram is called the ________.

Correct AnswerverifiedA

The distances for all the points from the regression line are squared and added together to arrive at the sum of the squared errors, which is a measure of total error.

Correct AnswerverifiedShow Answer

The null hypothesis in bivariate regression is ________.

Correct AnswerverifiedE

________ involves a single dependent variable and two or more independent variables.

Correct AnswerverifiedD

The difference between the observed value of Y and the value predicted by the regression equation is called the standard error.

Correct AnswerverifiedShow Answer

According to the text, the beta coefficient is also called the beta weight.

Correct AnswerverifiedShow Answer

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Regression analysis is a powerful and fl...
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Multiple regression is a statistical tec...
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E

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