The effectiveness of three brands of stain remover (EZ-Clean, SpotX, and OXYBoost) were rated (A = excellent to F = poor) by different groups of consumers.The appropriate nonparametric procedure to use to determine whether there differences in the perceived effectiveness among the three brands?
A)Wilcoxon Signed-Rank test.
B)Wilcoxon Rank Sum test.
C)Kruskal Wallis test.
D)Spearman's rho.
E)Mann-Whitney test.

Question

Quizplus · Accepted Answer

The Kruskal-Wallis test is the appropriate nonparametric procedure for comparing more than two independent samples, which aligns with the scenario of comparing the effectiveness of three different brands of stain remover.

The Effectiveness of Three Brands of Stain Remover (EZ-Clean, SpotX