One can optimize and strengthen the power of a t test in all of the following ways, EXCEPT
A) by using stronger treatments to drive the means of the two groups farther apart.
B) by decreasing the effect size of the study.
C) by decreasing the variability within groups.
D) by increasing the total size of the study.

Question

Quizplus · Accepted Answer

The effect size is directly proportional to the power of the t test. Therefore, decreasing the effect size of the study will weaken the power of the t test. All other options listed will strengthen the power of the t test, making it more likely to detect a significant difference between the groups being compared.

One Can Optimize and Strengthen the Power of a T