Power Project and NQuery Advisor ® Tutor Post-Evaluation Form 

Analysis Reviewed Multiple Regression        T-test

The following are some questions to assess your understanding of the statistical concept of power. 

1. What do we mean by the power of a statistical test?

2. Which symbolic statement represents power?  (Mark the correct response)

a

b

1-a

1- b

3. Name two factors that affect power and describe the effect they have on power.

4.  In a research study, what  problems might occur if the power level is too low? 

5.  In a research study, what problems might occur if the power level is too high?

6.  Please provide a definition of effect size.