How To... Perform the Mann-Whitney U Test (By Hand)

Learn how to perform the Mann-Whitney U Test by hand when you need to test for significant differences between two groups. Use this test instead of the Student T Test when data are not normally distributed, or when you are using ordinal (such as ratings) data.

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Thank you very much for your videos! By writing down the statistical tests it is easier to understand and you explain it very well, slowly and in a very clear way !

[AnNa..]

I don't have to perform it by hand but your explanation helped me understand what I'm "clicking" in Statistica. That was so helpful, thank you.

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