The critical value for a one-tailed Mann-Whitney U test with sample sizes of n1 = 10 and n2 = 10 is 23 for a 0.05 level of significance.

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The critical value for a one-tailed Mann-Whitney U test with sample sizes of n1 = 10 and n2 = 10 at a 0.05 level of significance is typically higher than 23. Exact critical values depend on tables or software calculations, but for these sample sizes, the value would generally be around 27 or 28, not 23.

The Critical Value for a One-Tailed Mann-Whitney U Test with Sample