When the normality assumption is not met in a randomized block design, which of the following tests should be used?
A) Wilcoxon rank sum test
B) Friedman rank test
C) Kruskal-Wallis test
D) Wilcoxon signed ranks test

Question

Quizplus · Accepted Answer

When the normality assumption is not met in a randomized block design, the Friedman rank test is a non-parametric alternative to the repeated measures ANOVA. It is used to investigate differences between groups when the dependent variable is ordinal or continuous but not normally distributed. The Wilcoxon rank sum test, Kruskal-Wallis test, and Wilcoxon signed ranks test are also non-parametric tests but are not appropriate for this particular design.

When the Normality Assumption Is Not Met in a Randomized