Explore BrainMass

Explore BrainMass

    Wilcoxon Signed-Rank Test and Kruskal-Wallis Test

    Not what you're looking for? Search our solutions OR ask your own Custom question.

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    a) What is the purpose of a Wilcoxon signed-rank test? Explain.

    b) The Wilcoxon signed-rank test resembles which parametric test(s)? Explain.

    c) What is the purpose of a Kruskal-Wallis test? Explain.

    d) The Kruskal-Wallis test is analogous to which parametric test? Explain.

    © BrainMass Inc. brainmass.com December 15, 2022, 8:08 pm ad1c9bdddf

    Solution Preview

    I will begin by answering B before A, and D before C.

    b) The Wilcoxon signed-rank test resembles the t-test. The t-test is used to test if there are any differences between two groups. We use the t-test when we are able to fulfill specific conditions such as: the population is normally distributed.

    a) So this being said, the Wilcoxon signed-rank test is used to test to see if there are any differences between groups when we are dealing a population is not normally distributed.
    To use this test, our data needs to be measured using interval data. The test will then examine if there are any significant differences between two samples pulled from a non-normally distributed population OR, if there is any differences between a repeated measures (one sample is tested, then ...

    Solution Summary

    This solution answers questions regarding the Wilcoxon Signed-Rank Test and the Kruskal-Wallis Test