Kruskal Wallis Test Example. The h test is used when the assumptions for anova aren t met like the assumption of normality it is sometimes called the one way anova on ranks as the ranks of the data values are used in the test rather than. Spss kruskal wallis test simple tutorial with example by ruben geert van den berg under nonparametric tests statistics a z.
Let us take an example to understand how to perform this test. You randomly split up a class of 90 students into three groups of 30. Ratings are examples of an ordinal scale of measurement and so the data are not suitable for a parametric test.
You randomly split up a class of 90 students into three groups of 30.
The kruskal wallis test is the non parametric alternative to the one way anova. We have three separate groups of participants each of whom gives us a single score on a rating scale. You randomly split up a class of 90 students into three groups of 30. Your variable of interest should be continuous can be skewed and have a similar spread across your groups.
