The assumption of a normal distribution within the underlying population of scores, is required with the
A) Spearman r
B) U test
C) chi square
D) none of these

Question

Quizplus · Accepted Answer

The assumption of a normal distribution is not required for Spearman r (a rank-order correlation coefficient), U test (Mann-Whitney U test, a nonparametric test for comparing two independent samples), or chi-square (a test for categorical data to assess differences in frequencies). These tests are used precisely because they do not assume normal distribution of the data.

The Assumption of a Normal Distribution Within the Underlying Population