Which nonparametric tests can be computed using a normal approximation formula to compute the test statistic? (Select all that apply.) sign test Wilcoxon signed-ranks T test Mann-Whitney U test Kruskal-Wallis H test Friedman test

Wilcoxon T test, Mann-Whitney U test, signs test

Explanation:

The Wilcoxon T test is a non-parametric statistical hypothesis test that compares two related samples on a single sample to assess whether their population mean ranks differ.

The Mann-Whitney U test is a test of the null hypothesis that it is equally likely that a value that was selected randomly from a certain population will be less than or greater than a randomly selected value from another population.

The signs test a statistical test that compares the sizes of two groups.