What is the approximate level of power for a study using ANOVA at the .05 significance level with four groups of 30 participants each (expected effect size is medium).
A) .13
B) .61
C) .96
D) .55

Question

Quizplus · Accepted Answer

Based on power calculations, a study with four groups of 30 participants each and a medium effect size (f = 0.25) would have a power of approximately 0.61 at an alpha level of 0.05. Therefore, the correct answer is B.

What Is the Approximate Level of Power for a Study