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PreClass Questions(PCQ) - 11

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1.

Students are tested and identified to have either high or low anxiety. Half of each group is either given an easy task to complete or a hard task to complete. The dependent variable is the level of accuracy. The means are shown below. A) identify the presence of main effects and interaction. B) explain the results in one sentence.

Anxiety level             Easy Task    Hard Task

Low                                 3.34           3.34

High                               5.55           1.19

 

2.

Assume you have completed two experiments getting the same F value from both. How could this occur if the within group variability in one experiment was twice as large as the within group variability in the other experiment?

 

3.

 In a 3 X 3 analysis of variance, how many null hypotheses are there?

A.

 1

B.

 2

C.

 3

D.

 9
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Revised: September 23, 2001.