When researchers have a good estimate of the expected effect size for an independent variable prior to conducting a study,they should
A) perform a power analysis.
B) compute an inferential statistics test.
C) draw confidence intervals for their means.
D) all of these

Question

Quizplus · Accepted Answer

Performing a power analysis is the best choice in this situation because it allows researchers to calculate the minimum sample size needed to detect a certain effect size with a desired level of statistical power. This ensures that the study has enough participants to detect the expected effect of the independent variable. While computing inferential statistics tests and drawing confidence intervals are important after the study has been conducted, they do not directly address the issue of sample size determination.

When Researchers Have a Good Estimate of the Expected Effect