Approximately how many research participants would be required for 80% power for a study using the t test for dependent means (assume a two-tailed hypothesis with an expected small effect size of .20):
A)156
B)196
C)26
D)33

Question

Quizplus · Accepted Answer

Using a power analysis calculator with the following specifications: alpha level = .05, power = .80, effect size = .20, and dependent t-test analysis, the estimated sample size is approximately 196 participants.

Approximately How Many Research Participants Would Be Required for 80