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  "body": "\n## Summary\n\nThe Kruskal–Wallis test is a [[hypothesis test|087P03NEND]] of whether several independent samples come from the same distribution.\nIt replaces the data by their ranks in the pooled sample and measures how much the mean ranks of the groups differ.\nIt is the rank-based counterpart of one-way [[analysis of variance|M9AQ5HKGP4]], and for two groups it is equivalent to the [[Mann–Whitney U test|CKF9KDXBP7]].\n\n## Explanations\n\n### L1 human\n\nSuppose three fertilisers are tried on separate plots and the yields are recorded.\nLine up all the yields together and number them from smallest to largest.\nIf the fertilisers make no difference, each group should get a fair mix of low and high numbers, and the average number in each group should be near the middle.\nThe test statistic grows when some groups get mostly high numbers and others mostly low ones.\n",
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