Uploaded February 2023 | Updated September 2026, 7 hours ago

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What is a Mann-Whitney U Test? And how is it calculated? That's what we will discuss in this video. A Mann-Whitney U test tests whether there is a difference between two independent samples.
An example: Is there a difference between the reaction time of women and men?

But the t-test for independent samples does the same!?! It also tests whether there is a difference between two independent samples. The Mann Whitney U Test is the non-parametric counterpart to the t-test for independent samples.

► Load sample data set
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► Online Calculator Mann-Whitney U-test
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► Mann-Whitney U-test Tutorial
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► E-BOOK
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00:00 What is a Mann-Whitney U Test?
00:23 Mann-Whitney U Test vs. t-test for independent samples
02:07 Hypotheses Mann-Whitney U Test
02:25 Example Mann-Whitney U Test
02:43 Calculate Mann-Whitney U Test with DATAtab
03:47 Calculate Mann-Whitney U Test by hand
08:03 Mann-Whitney U Test with tied ranks

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