Which of the Following Best Describes the Hypotheses in the Kruskal-Wallis

Short Answer

Which of the following best describes the hypotheses in the Kruskal-Wallis test and Friedman test? $\begin{array}{|l|l|}\hline A&\text {Two-tailed. }\\\hline B&\text {One-tailed. }\\\hline C&\text { Based on one sample.}\\\hline D&\text { None of these choices are correct.}\\\hline \end{array}$