Statistical power can be enhanced by decreasing the standard deviation in the sample.This can be accomplished by all of these EXCEPT:
A) working with a biased sample.
B) using a more reliable measure.
C) sampling a more homogeneous group.
D) working with a narrower, less variable, distribution of scores.

Question

Quizplus · Accepted Answer

Working with a biased sample would actually increase the standard deviation and decrease statistical power. The best choices for enhancing statistical power by decreasing the standard deviation would be B, C, and D, as using a more reliable measure, sampling a more homogeneous group, and working with a narrower, less variable distribution of scores would all result in a decrease in standard deviation.

Statistical Power Can Be Enhanced by Decreasing the Standard Deviation