When comparing the output of strawberries grown on plots using fertilizer A with that grown on otherwise identical plots using fertilizer B, making a general assessment of relative fertilizer effectiveness may well call for a:
A) sign test.
B) Kruskal-Wallis test.
C) Wilcoxon signed-rank test for paired samples.
D) Wilcoxon rank-sum test.

Question

Quizplus · Accepted Answer

The Wilcoxon rank-sum test is appropriate for comparing the output of two independent groups, which is the case here with fertilizer A and fertilizer B. The other tests mentioned are either for paired samples (C) or for more than two groups (B), or are irrelevant in this context (A).

When Comparing the Output of Strawberries Grown on Plots Using