When the difference in the location of two populations is to be compared based on observations from two independent samples,and the variable is measured on an ordinal scale,the ________ can be used.
A) Kolmogorov-Smirnov one-sample test
B) Mann-Whitney U test
C) runs test
D) binomial test

Question

Quizplus · Accepted Answer

The Mann-Whitney U test is used to compare the location of two populations based on observations from two independent samples, where the variable is measured on an ordinal scale. It is a nonparametric test that does not assume normality or equal variances in the populations. Therefore, it is the best choice in this scenario. The Kolmogorov-Smirnov one-sample test is used to compare the distribution of a sample to a known distribution, the runs test is used to test for randomness in a sequence, and the binomial test is used to test hypotheses about proportions for a categorical variable. These tests are not suitable for comparing the location of two populations based on ordinal data.

When the Difference in the Location of Two Populations Is