Comparing the output of strawberries grown on plots using fertilizer A with that grown on otherwise identical plots using fertilizer B,in order to make a general assessment of relative fertilizer effectiveness,may well call for a:

A) Friedman test.
B) Kruskal-Wallis test.
C) Wilcoxon rank-sum test.
D) Spearman rank correlation test.

Fertilizer Effectiveness

A measure of how much a fertilizer increases plant growth and yield compared to plants not receiving the fertilizer.

Friedman Test

A non-parametric test used to detect differences in treatments across multiple test attempts.

Kruskal-Wallis Test

A nonparametric statistical test used to determine if there are statistically significant differences between two or more groups of an independent variable on a continuous or ordinal dependent variable.