The problems associated with high variance often can be minimized by transforming the original scores to ranks and then conducting an alternative statistical analysis known as the Mann-Whitney test.

Question

The problems associated with high variance often can be minimized by transforming the original scores to ranks and then conducting an alternative statistical analysis known as the Mann-Whitney test.​

Quizplus · Accepted Answer

The Mann-Whitney test is a nonparametric test that can be used as an alternative to the t-test when the assumptions of normality and equal variances are violated. By transforming the original scores to ranks, the impact of extreme values (i.e., high variance) is reduced, making the Mann-Whitney test a more robust and reliable statistical analysis in some cases.

The Problems Associated with High Variance Often Can Be Minimized