Kruskal–Wallis group comparison
Compare three or more independent groups using pooled ranks.
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Enter 3–20 groups with at least two values each; overall maximum is 500. P-values use a tie-adjusted chi-square approximation.
The starting values are hypothetical. Results update as you edit. Use aggregate or synthetic inputs only.
Calculation results
- Tie-corrected H
- 5.3532028
- Degrees of freedom
- 2
- Asymptotic p
- 0.068796568
- Minimum group size
- 4
How to interpret the output
The omnibus statistic compares group rank sums. It is not generally a test of medians unless distribution shapes are comparable. Small groups and heavy ties can require permutation inference; pairwise follow-up needs its own multiplicity plan.
Method referenceSource checked 2026-11-06. Read the reproducible calculator validation report.