To determine the appropriate sample size for a study, one needs to know
A) the minimum effect size one is interested in detecting.
B) the alpha level to be used for the statistical tests.
C) whether one will be using a one-tailed or two-tailed statistical test.
D) all of the above.

Question

Quizplus · Accepted Answer

All of the factors listed (minimum effect size, alpha level, and one-tailed or two-tailed test) can impact the appropriate sample size for a study. Therefore, all three pieces of information are needed to determine the optimal sample size.

To Determine the Appropriate Sample Size for a Study, One