Question 1

Which of the following is NOT a problem caused by multicollinearity in multiple regression?

Accepted Answer

A)  The F-test of the overall multiple regression model may indicate a statistically significant relationship, but the t-tests for the individual coefficients may not indicate any as significant. 
B)  The regression coefficients can have a sign opposite that of the actual relationship. 
C)  It impacts the size of the R2 and the ability to predict values of the dependent variable. 
D)  With a high degree of collinearity we cannot rely on the individual coefficients to interpret the results. 
E)  All of these choices are problems caused by multicollinearity in multiple regression.

Question 2

Sandy wants to examine if gender is related to soft drink consumption. What correlation coefficient is appropriate for this?

Accepted Answer

A)  Pearson correlation 
B)  Spearman's rho 
C)  Likert correlation 
D)  c2 
E)  nonlinear correlation coefficient

Question 3

A _____ is an easy way to visually display the covariation between two variables and is a plot of the values of two variables for all the observations in the sample.

Accepted Answer

A)  residual plot 
B)  normal distribution 
C)  scatter diagram 
D)  histogram 
E)  frequency distribution

Question 4

If there is a single dependent variable, a technique is referred to as a _____ method. That is, there are both dependent and independent variables in the analysis.

Accepted Answer

A)  dependence 
B)  interdependence 
C)  statistical 
D)  confirmatory 
E)  quantitative

Question 5

A one tailed test is used when you cannot predict the direction of the hypothesized relationship.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following can be used to examine the statistical difference between the means of two or more groups if the dependent variable is metric and the independent variable(s) is nonmetric?

Accepted Answer

A)  ANOVA 
B)  Spearman's Correlation 
C)  Cluster analysis 
D)  Correlation 
E)  Factor analysis

Question 7

Which statistic is appropriate for assessing the correlation for nonmetric data?

Accepted Answer