The approximate total number of participants needed for 80% power with a 3 by 3 (df = 4)contingency table at the .05 level if you expect a medium effect would be:
A)48
B)133
C)1,194
D)121

Question

Quizplus · Accepted Answer

To calculate the sample size needed, we can use G*Power software or a sample size calculator. Using the latter, inputting 80% power, medium effect size, 3 by 3 contingency table, and alpha of .05, we get a total sample size of 133. Therefore, B is the best choice.

The Approximate Total Number of Participants Needed for 80% Power