Question: reply to this Parametric tests are used when the data are assumed to follow a normal distribution of data. The non-parametric test listed here, the

reply to this Parametric tests are used when the data are assumed to follow a normal distribution of data. The non-parametric test listed here, the Mann-Whitney U test is used to compare two samples or groups. This non-parametric test is used when a skewed distribution can be assumed. The samples or groups also need to be randomly selected in order to use the test

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