__________ are designed to control the experimentwise alpha level in means comparisons that are made after the data have been collected.
a. A priori means comparisons
b. Contrast analyses
c. Post hoc means comparisons
d. Contrast weights
Means that are not being compared in a contrast analysis are given the contrast weight of
a. +1.00
b. zero.
c. -1.00
d. one-half.
In a contrast analysis, the sum of the contrast weights
a. can vary from -1.00 to +1.00
b. must equal -l.00
c. must equal 1.00
d. must equal zero.
Contrast weights are set by the researchers in order to
a. order the values of the means.
b. indicate how the group means are to be compared.
c. double-check that the F value is significant.
d. turn a correlational design into an experimental design.
A contrast analysis involves
a. computing a correlation coefficient.
b. comparing Pearson correlations.
c. computing an F value.
d. computing beta weights.
A means comparison is used
a. to test the differences between and among particular group means.
b. to determine which statistical procedure should be used to compare two or more means.
c. only to test the differences between group means that were planned before data collection.
d. only to test the differences between group means that were planned after data collection.
What is the most general method of conducting means comparisons that have been planned a priori?
a. Loglinear analysis
b. Contrast analysis
c. Analysis of covariance
d. Multiple regression
A __________ analysis is a statistical procedure that is used when more than one nominal variable is used to predict a nominal outcome variable.
a. loglinear
b. contrast
c. chi-square
d. covariance
Which of the following can be used to control for the effects of potential confounding variables?
a. Multiple regression
b. Pearson correlation
c. Confirmatory factor analysis
d. Exploratory factor analysis
A researcher has developed a theory about which predictor variable should be entered first, second, and third to predict the outcome variable. He will want to use which of the following?
a. Simultaneous multiple regression
b. Hierarchical multiple regression
c. Stepwise multiple regression
d. Overweighted multiple regression
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