Kruskal-Wallis Test

The non-parametric, independent Kruskal-Wallis test tests if several groups with ordinal attributes originate from the same distribution.

More information can be found at Kruskal-Wallis test on Wikipedia.

Hypotheses:
H₀: the mean ranks of the groups are the same.
H_A: the mean ranks of the groups differ.

Options

Test column

Column containing the independent samples (ordinal/numeric values) to be tested.

Group column

Column containing the group labels that define which group each sample belongs to.

Missing value strategy

Strategy for handling missing and Double.NaN values in the test column:

Failed: An exception is thrown and the node fails to execute if missing values are present.
Fixed: Missing values are replaced with Double.NaN and included in the ranking.
Maximal: Missing values are considered to be maximal in the ranking.
Minimal: Missing values are considered to be minimal in the ranking.

: Input table with at least one ordinal column and one nominal column (groups).

: Output table with Kruskal-Wallis test statistic, p-Value, and descriptive statistics of group ranks.

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Plugin provider: KNIME AG, Zurich, Switzerland

Plugin version: 5.12.0.v202605080936

On NodePit since: 2026-08-08

Last update: 2026-08-13

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