What is the approximate power for a study using the t test for dependent means with an expected small effect size (.20), two-tailed test, N = 40?
A)19
B)24
C)55
D)nearly 1

Question

Quizplus · Accepted Answer

With an expected small effect size (.20), a two-tailed test, and N = 40, the approximate power is around 24%. This is because smaller effect sizes require larger sample sizes to achieve the same power, and with N = 40, the power is relatively low for detecting a small effect.

What Is the Approximate Power for a Study Using the T