SOCR EduMaterials AnalysisActivities KruskalWallies
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SOCR Analyses Example on the Kruskal-Wallies Test
The Kruskal-Wallies Test is a generalization of the Two Independent Sample Wilcoxon Test. While the latter one test for two groups, the Kruskal-Wallies Test test multiple groups. Suppose there are k groups, the hypotheses are written as:
Null Hypothesis H_0: All of the k population distribution functions are identical. Alternative Hypothesis H_A: At least one of the populations tends to yield larger observations than at least one of the other populations.
The example we show here is from "Practical Nonparametric Statistics" by Conover, Second Edition, John Wiley & Sons, 1980. (Page 230)
Steps: 1. The data of this example has 4 groups. Click on "Example" button than the "Data" button to see the data.
