Question 1

Which one of the following tools is not used to check the normality of residuals assumption for a multiple regression model?

Accepted Answer

A)  histogram 
B)  stem-and-leaf display 
C)  scatter diagram 
D)  normal plot 
A)  histogram 
B)  stem-and-leaf display 
C)  scatter diagram 
D)  normal plot

Question 2

In multiple regression analysis,a desirable residual plot has what type of appearance?

Accepted Answer

A)  curved 
B)  cyclical 
C)  fanning out 
D)  funneling in 
E)  horizontal band 
A)  curved 
B)  cyclical 
C)  fanning out 
D)  funneling in 
E)  horizontal band

Question 3

When the quadratic regression model y = β0 + β1x + β2x2 + ε is used,the term β1shows the rate of curvature of the parabola.

Accepted Answer

A) True 
 B)False

Question 4

An acceptable residual plot exhibits

Accepted Answer

A)  increasing error variance. 
B)  decreasing error variance. 
C)  constant error variance. 
D)  a curved pattern. 
E)  a mixture of increasing and decreasing error variance. 
A)  increasing error variance. 
B)  decreasing error variance. 
C)  constant error variance. 
D)  a curved pattern. 
E)  a mixture of increasing and decreasing error variance.

Question 5

If a particular multiple regression model has a small value of the C statistic and C for this model is less than k+1,where k is the number of independent variables in the model,then the model should be considered biased and therefore undesirable.

Accepted Answer

A) True 
 B)False

Question 6

For a given multiple regression model with three independent variables,the value of the adjusted multiple coefficient of determination is_________ less than R2.

Accepted Answer

A)  always 
B)  sometimes 
C)  never 
A)  always 
B)  sometimes 
C)  never

Question 7

Adding any independent variable to a regression model will increase ____________.

Accepted Answer

A)  adjusted   
B)  s 
C)  MSE 
D)    
E)  the length of all prediction intervals 
A)  adjusted   
B)  s 
C)  MSE 
D)    
E)  the length of all prediction intervals

Question 8

The general form of the quadratic multiple regression models is

Accepted Answer

A)  y = β1x1 + β2x2 + ε 
B)  y = β0 + β1x1 + β2x2 + ε 
C)  y = β0 + β1x + β2x2 + ε 
D)  y = β0 + β1x2 + ε 
E)  y = β0 + β1x1 +β2x22+ ε 
A)  y = β1x1 + β2x2 + ε 
B)  y = β0 + β1x1 + β2x2 + ε 
C)  y = β0 + β1x + β2x2 + ε 
D)  y = β0 + β1x2 + ε 
E)  y = β0 + β1x1 +β2x22+ ε

Question 9

The assumption of independent error terms in regression analysis is often violated when using time-series data.

Accepted Answer

A) True 
 B)False

Question 10

A ttest is used in testing the significance of an individual independent variable.

Accepted Answer

A) True 
 B)False

Question 11

In the quadratic regression model y = β0 + β1X1 + β2X12 + ε,if the term β2 is ___________ zero,then the parabola opens ____________.

Accepted Answer

A)  less than,upward 
B)  greater than,upward 
C)  greater than,either upward or downward 
D)  less than,either upward or downward 
E)  equal to,downward 
A)  less than,upward 
B)  greater than,upward 
C)  greater than,either upward or downward 
D)  less than,either upward or downward 
E)  equal to,downward

Question 12

In a regression model,a value of the error term depends upon other values of the error term.

Accepted Answer

A) True 
 B)False

Question 13

In regression analysis,the standard error(s)is _________ greater than the standard deviation of y (the dependent variable).

Accepted Answer

A)  always 
B)  sometimes 
C)  never 
A)  always 
B)  sometimes 
C)  never

Question 14

In using the multiple regression method,we can model the effects of the different levels of a qualitative independent variable by using a(n)____________.

Accepted Answer

A)  interaction variable 
B)  cross-product term 
C)  quadratic term 
D)  dummy (indicator)variable 
E)  variance equalizing transformation 
A)  interaction variable 
B)  cross-product term 
C)  quadratic term 
D)  dummy (indicator)variable 
E)  variance equalizing transformation

Question 15

In general,a multiple regression model is considered to be desirable if the value of the C statistic is small and the value of C is less than _____.

Accepted Answer

A)  k 
B)  k − 1 
C)  k + 1 
D)  n − k 
A)  k 
B)  k − 1 
C)  k + 1 
D)  n − k

Which one of the following tools is not used to check the normality of residuals assumption for a multiple regression model?

In multiple regression analysis,a desirable residual plot has what type of appearance?

When the quadratic regression model y = β₀ + β₁x + β₂x² + ε is used,the term β₁shows the rate of curvature of the parabola.

An acceptable residual plot exhibits

If a particular multiple regression model has a small value of the C statistic and C for this model is less than k+1,where k is the number of independent variables in the model,then the model should be considered biased and therefore undesirable.

For a given multiple regression model with three independent variables,the value of the adjusted multiple coefficient of determination is_________ less than R².

Adding any independent variable to a regression model will increase ____________.

The general form of the quadratic multiple regression models is

The assumption of independent error terms in regression analysis is often violated when using time-series data.

A ttest is used in testing the significance of an individual independent variable.

In the quadratic regression model y = β₀ + β₁X₁ + β₂X₁² + ε,if the term β₂ is _ zero,then the parabola opens __.

In a regression model,a value of the error term depends upon other values of the error term.

In regression analysis,the standard error(s)is _________ greater than the standard deviation of y (the dependent variable).

In using the multiple regression method,we can model the effects of the different levels of a qualitative independent variable by using a(n)____________.

In general,a multiple regression model is considered to be desirable if the value of the C statistic is small and the value of C is less than _____.

An Introduction to Business Statistics

Descriptive Statistics: Tabular and Graphical Methods

Descriptive Statistics: Numerical Methods

Probability

Discrete Random Variables

Continuous Random Variables

Sampling and Sampling Distributions

Confidence Intervals

Hypothesis Testing

Statistical Inferences for Means and Proportions

Statistical Inferences for Population Variances

Experimental Design and Analysis of Variance

Chi-Square Tests

Multiple Regression and Model Building

Time Series Forecasting and Index Numbers

Nonparametric Methods

Decision Theory

Filters

Exam 14: Simple Linear Regression Analysis

Which one of the following tools is not used to check the normality of residuals assumption for a multiple regression model?

In multiple regression analysis,a desirable residual plot has what type of appearance?

When the quadratic regression model y = β0 + β1x + β2x2 + ε is used,the term β1shows the rate of curvature of the parabola.

An acceptable residual plot exhibits

If a particular multiple regression model has a small value of the C statistic and C for this model is less than k+1,where k is the number of independent variables in the model,then the model should be considered biased and therefore undesirable.

For a given multiple regression model with three independent variables,the value of the adjusted multiple coefficient of determination is_________ less than R2.

Adding any independent variable to a regression model will increase ____________.

The general form of the quadratic multiple regression models is

The assumption of independent error terms in regression analysis is often violated when using time-series data.

A ttest is used in testing the significance of an individual independent variable.

In the quadratic regression model y = β0 + β1X1 + β2X12 + ε,if the term β2 is ___________ zero,then the parabola opens ____________.

In a regression model,a value of the error term depends upon other values of the error term.

In regression analysis,the standard error(s)is _________ greater than the standard deviation of y (the dependent variable).

In using the multiple regression method,we can model the effects of the different levels of a qualitative independent variable by using a(n)____________.

In general,a multiple regression model is considered to be desirable if the value of the C statistic is small and the value of C is less than _____.

An Introduction to Business Statistics

Descriptive Statistics: Tabular and Graphical Methods

Descriptive Statistics: Numerical Methods

Probability

Discrete Random Variables

Continuous Random Variables

Sampling and Sampling Distributions

Confidence Intervals

Hypothesis Testing

Statistical Inferences for Means and Proportions

Statistical Inferences for Population Variances

Experimental Design and Analysis of Variance

Chi-Square Tests

Multiple Regression and Model Building

Time Series Forecasting and Index Numbers

Nonparametric Methods

Decision Theory

Filters

When the quadratic regression model y = β₀ + β₁x + β₂x² + ε is used,the term β₁shows the rate of curvature of the parabola.

For a given multiple regression model with three independent variables,the value of the adjusted multiple coefficient of determination is_________ less than R².

In the quadratic regression model y = β₀ + β₁X₁ + β₂X₁² + ε,if the term β₂ is _ zero,then the parabola opens __.