The nonparametric tests discussed in your text (Wilcoxon rank sum test, sign test, Wilcoxon signed-rank test, Kruskal-Wallis test, and Friedman test) all require that the probability distributions have which of the following properties?
A) They must be identical except with respect to location.
B) They must be identical except with respect to spread (variance).
C) They must be identical except with respect to shape (distribution).
D) They must be different with respect to location, spread, and shape.

Question

Quizplus · Accepted Answer

Nonparametric tests like the Wilcoxon rank sum test, sign test, Wilcoxon signed-rank test, Kruskal-Wallis test, and Friedman test assume that the probability distributions are identical except for differences in location (central tendency).

The Nonparametric Tests Discussed in Your Text (Wilcoxon Rank Sum