Analyzes the observed differences in the process median from one input setting to another. This test is similar to the one-way ANOVA, and is an alternative to the one-way ANOVA for cases where the sample data taken at each input level are not reasonably normal. Generally, the Kruskal-Wallis median test is the preferred, more powerful nonparametric alternative to the one-way ANOVA when the normality assumption fails badly. However, Mood's median test may be more appropriate than the Kruskal-Wallis median test when outliers are present.
|When to Use||Purpose|
|Mid-project||Test which inputs have significant influence on the output by fixing an input at different settings (levels).|
Continuous Y (output), a single X (input) at two or more levels.