A researcher is concerned about not being able to detect true differences. From the following options, how would you advise the researcher regarding her analyses?
A) Change the probability level to p= .001
B) Evaluate and conduct the study with a new sample
C) Reanalyze with a two-tailed analyses
D) Use a non-parametric significance test

Question

Quizplus · Accepted Answer

Conducting the study with a new sample is the best option as it increases the sample size and thus enhances the power of the study to detect true differences. Changing the probability level to p=.001 would increase the risk of rejecting a true null hypothesis and would not address the issue of not being able to detect true differences. Reanalyzing with a two-tailed analysis may increase the likelihood of detecting differences but does not address the power issue. Using a non-parametric significance test may be useful when assumptions of normality or homogeneity of variance are violated, but it also does not address the power issue.

A Researcher Is Concerned About Not Being Able to Detect