In conducting a Mann-Whitney U test when the sample size is greater than 20, the U test statistic can be assumed normally distributed.

Name: In conducting a Mann-Whitney U test when the sample size is greater than 20, the U test statistic can be assumed normally distributed.
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For large sample sizes (typically n > 20), the Mann-Whitney U statistic can be approximated by a normal distribution due to the Central Limit Theorem, allowing for the use of z-scores in significance testing.

In Conducting a Mann-Whitney U Test When the Sample Size