Nonparametric
Kruskal-Wallis test
Compares three or more groups by ranks.
Variables
- Dependent variableContinuous · Ordinal — 1
- FactorNominal · Ordinal — 1
Options
- Post-hoc comparisons
- AdjustmentHolm · Bonferroni · None
What it reports
H, df, p; the ε² effect size; Dunn comparisons.
scipy+formula · Open the accuracy report
When does this apply?
The same design as the one-way ANOVA — three or more independent groups, the outcome in one column and the group name in a categorical column — but the comparison is by ranks, so the outcome may also be ordinal. The output is H, the degrees of freedom, p, and ε² with a 95% confidence interval; pairwise differences appear in Dunn’s post-hoc comparisons under the selected multiplicity adjustment.