According to the rationale for nonparametric tests, the null hypothesis is that the sum of the ranks of Population A and Population B will be
A) equal
B) unequal, with A B
C) unequal, with B A
D) unequal, with the direction being chosen by the researcher.

Question

According to the rationale for nonparametric tests, the null hypothesis is that the sum of the ranks of Population A and Population B will be
A) equal
B) unequal, with A > B
C) unequal, with B > A
D) unequal, with the direction being chosen by the researcher.

Quizplus · Accepted Answer

Nonparametric tests, such as the Mann-Whitney U test, do not assume a specific distribution for the data. The null hypothesis typically posits no difference between groups, which translates to the expectation that the sum of the ranks for two populations (A and B) will be equal, under the assumption that there is no effect or difference between them.

According to the Rationale for Nonparametric Tests, the Null Hypothesis