Multiple choice

1. In a one-way ANOVA, the term one-way is used because:

A. the differences are always positive because they are all squared before being added. 

B. the F-statistic can move in only one direction. 

C. only one independent variable is used in the analysis. 

D. only one mean is used as the null hypothesis. 

2. Which of the following statements about Scheffe test is INCORRECT?

A. It is a kind of a follow-up (or post hoc) test. 

B. It is a rather conservative test. 

C. It is equivalent to simultaneous two-tailed hypothesis tests. 

D. The confidence intervals tend to be narrower in this method than in other methods. 

3. When knowledge about the behavior of one variable allows you to predict the behavior of another variable, this is another way of studying the __________ of the relationship.

A. presence 

B. direction 

C. strength of association 

D. type 

4. While studying the relationship between advertising and sales growth, a researcher determines that the relationship is sometimes weak and at other times moderate. This variation from one situation to another is the variation in the __________ of the relationship between advertisement and sales growth.

A. strength of association 

B. presence 

C. type 

D. direction