Statistics for the Behavioral Sciences
Quiz 16: Nonparametric Statistics
The Kruskal-Wallis Test Is the Nonparametric Counterpart of One-Way Between
The Kruskal-Wallis test is the nonparametric counterpart of one-way between subjects analysis of variance.
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In a Kruskal-Wallis test,if the null hypothesis of no relationship between the independent variable and the dependent variable is true,we would expect the mean ranks for the three conditions to be different,within the constraints of sampling error.
The strength of the relationship for the Kruskal-Wallace test can be measured with eta-squared.
Analogous to analysis of variance,rejection of the null hypothesis when a nonparametric test is applied to more than two groups tells us only that at least two of the groups differ,but does not indicate the nature of the relationship.
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