Question 1

If the F-value in ANOVA produces a significantly high p-value (a.k.a."Sig." in SPSS)of 0.11 or more,then it is appropriate to proceed with a post-hoc test (e.g. ,Duncan).

Accepted Answer

A) True 
 B)False

Question 2

When independent variables in a multiple regression equation are highly correlated among themselves,it indicates the existence of ____.The statistics used to measure if this exists is called VIF.

Accepted Answer

A) unstandardized coefficients 
B) standardized coefficients 
C) multicollinearity 
D) standard error 
E) standard deviation

Question 3

Let's assume we find in a study that the Pearson's correlation coefficient between number of years of education and cigarette smoking is -0.73.This means that as education level increases

Accepted Answer

A) smoking tends to increase. 
B) smoking tends to decrease. 
C) smoking changes 73%. 
D) education and smoking are unrelated. 
E) an educated person smokes 73 cigarettes a day.

Question 4

In the chi-square analysis,the greater the differences between the observed frequencies and the expected frequencies,the less likely it is that there will be a statistically significant relationship.

Accepted Answer

A) True 
 B)False

Question 5

Assuming the two predictors X1 and X2 are not correlated,the coefficients of partial regression,  and  ,can be interpreted as the

Accepted Answer

A) unit change in the criterion variable associated with an average change in the appropriate predictor variable while holding the other predictor variable constant. 
B) change in the criterion variable associated with an average change in the predictor variables. 
C) average change in the criterion variable associated with an average change in the appropriate predictor variable while holding the other predictor variable constant. 
D) average change in the criterion variable associated with a unit change in the appropriate predictor variable while holding the other predictor variable constant. 
E) average change in the criterion variable associated with a unit change in the appropriate predictor variable.

Question 6

A graphic technique in which a sample element's scores on two variables are used to position the element on a graph so that the nature of the relationship between two variables can be observed is called a(n)____________________.

Accepted Answer

The answer of A graphic technique in which a sample...

Question 7

A statistical technique used with a continuous dependent variable and one or more categorical independent variables is called a(n)____________________.

Accepted Answer

The answer of A statistical technique used with a continuous...

Question 8

Exhibit 20.1 A researcher is interested in comparing the usage of bank debit cards by consumers in rural (r)and urban (u)areas.Each year for the past five years,she has surveyed 500 individuals (one-half urban,one-half rural)randomly selected from across the United States.She is specifically interested in any differences that may exist between the two groups with regard to usage.The results of the current study indicate that people in urban areas use bank debit cards 12 times per month on average (  ),while those in rural areas use bank cards 10 times per month on average (  ).
Refer to Exhibit 20.1.Assuming that the standard error of estimate for the difference in means is 1.5,calculate the value of the test statistic that would be used in the comparison of the two means.

Accepted Answer

A) 0.75 
B) 1.33 
C) 1.88 
D) 1.96 
E) None of the above.

Question 9

The value of the product-moment coefficient of correlation ranges from

Accepted Answer

A) -1.0 to 0.0. 
B) -1.0 to 1.0. 
C) -0.5 to 0.5. 
D) 0.0 to 1.0. 
E) -¥ to ¥.

Question 10

The numerator in the Pearson product-moment correlation coefficient formula

Accepted Answer

A) is called the cross-products sum. 
B) establishes the degree of covariation between two variables. 
C) can range from -1.0 to +1.0. 
D) Both a and b. 
E) Both b and c.

Question 11

If the correlation between two variables x and y is equal to -0.90,which of the following is TRUE?

Accepted Answer

A) x and y are highly related,whereby a positive change in x is accompanied by a positive change in y. 
B) The two variables x and y are not related to one another. 
C) x and y are highly related,whereby a negative change in x is accompanied by a positive change in y. 
D) The coefficient of determination is equal to -0.81. 
E) An increase in x is accompanied by a decrease in y.

Question 12

A simple regression is a statistical technique used to derive an equation that relates a single continuous dependent variable to two or more independent variables.

Accepted Answer

A) True 
 B)False

Question 13

Exhibit 20.2 Suppose that the relationship between sales (Y,in $000)and number of salespeople (X)is represented by the following regression equation:
Y = 105.2 + 35.8X
Refer to Exhibit 20.2.What will average sales be equal to when 10 salespeople are used?

Accepted Answer

A) $358,000 
B) $463.20 
C) $358.00 
D) $463,200 
E) More information is needed to answer this question.

Question 14

A gum manufacturer wants to determine whether blue packaging or red packaging is preferred.The company performs a sales test by introducing red packages into a random sample of ten stores and blue packages are introduced in an independent,random sample of ten stores.The technique most appropriate for analyzing the data is

Accepted Answer

A) paired sample t-test for means. 
B) Spearman rank-order correlation analysis. 
C) regression analysis. 
D) independent samples t-test for means. 
E) correlation analysis.

Question 15

Volvo cars,which have typically been positioned high on the safety attributes wants to know if people will respond favorably to proposed style changes.A sales manager wants to know if salespersons' morale is related to increases in recognition awards.These are questions that may be answered through

Accepted Answer

A) relationship analysis. 
B) chi-square analysis. 
C) associative analysis. 
D) analysis of variance. 
E) causal analysis.

Question 16

A research study involving the research question: "On the basis of a survey of husband-wife households,is there a significant difference between the mean attitude score of husbands and that of wives toward our product?" will involve a

Accepted Answer

A) test for a single proportion. 
B) test of two means when samples are independent. 
C) test for a single mean. 
D) test of two means when samples are dependent. 
E) None of the above.

Question 17

Cross tabulation work equally will with continuous measures that have been recast as categorical measures.

Accepted Answer

A) True 
 B)False

Question 18

Which of the following is a technique that measures the association between a criterion variable and one or more independent variables?

Accepted Answer

A) Correlation analysis 
B) Analysis of variance 
C) Regression analysis 
D) z-test 
E) F-test

Question 19

In ANOVA,a ____ allows a researcher to examine simultaneously the effects of two or more independent variables.

Accepted Answer

A) cross tabulation 
B) scatter diagram 
C) correlation coefficient 
D) factorial design 
E) coefficient of determination

Question 20

Multicollinearity is said to be present in a regression problem if the

Accepted Answer

A) predictor variables are independent. 
B) criterion variables are independent. 
C) criterion variables are correlated among themselves. 
D) predictor variables are correlated among themselves. 
E) error terms are correlated.

Exam 20: Data Analysis: Analyzing Multiple Variables Simultaneously

If the F-value in ANOVA produces a significantly high p-value (a.k.a."Sig." in SPSS)of 0.11 or more,then it is appropriate to proceed with a post-hoc test (e.g. ,Duncan).

When independent variables in a multiple regression equation are highly correlated among themselves,it indicates the existence of ____.The statistics used to measure if this exists is called VIF.

Let's assume we find in a study that the Pearson's correlation coefficient between number of years of education and cigarette smoking is -0.73.This means that as education level increases

In the chi-square analysis,the greater the differences between the observed frequencies and the expected frequencies,the less likely it is that there will be a statistically significant relationship.

Assuming the two predictors X₁ and X₂ are not correlated,the coefficients of partial regression, and ,can be interpreted as the

A graphic technique in which a sample element's scores on two variables are used to position the element on a graph so that the nature of the relationship between two variables can be observed is called a(n)____________________.

A statistical technique used with a continuous dependent variable and one or more categorical independent variables is called a(n)____________________.

The value of the product-moment coefficient of correlation ranges from

The numerator in the Pearson product-moment correlation coefficient formula

If the correlation between two variables x and y is equal to -0.90,which of the following is TRUE?

A simple regression is a statistical technique used to derive an equation that relates a single continuous dependent variable to two or more independent variables.

Exhibit 20.2 Suppose that the relationship between sales (Y,in $000) and number of salespeople (X) is represented by the following regression equation: Y = 105.2 + 35.8X Refer to Exhibit 20.2.What will average sales be equal to when 10 salespeople are used?

Volvo cars,which have typically been positioned high on the safety attributes wants to know if people will respond favorably to proposed style changes.A sales manager wants to know if salespersons' morale is related to increases in recognition awards.These are questions that may be answered through

A research study involving the research question: "On the basis of a survey of husband-wife households,is there a significant difference between the mean attitude score of husbands and that of wives toward our product?" will involve a

Cross tabulation work equally will with continuous measures that have been recast as categorical measures.

Which of the following is a technique that measures the association between a criterion variable and one or more independent variables?

In ANOVA,a ____ allows a researcher to examine simultaneously the effects of two or more independent variables.

Multicollinearity is said to be present in a regression problem if the