Understanding the Mann-Whintey U

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The Mann-Whitney U compares two independent (unrelated) samples by their rank. It is the non-parametric equivalent of the independent samples t-test. In this video, I explain the basic principles behind the Mann-Whitney U with a few examples and graphics. In the full course, I walk students through the Mann-Whitney U and other non-parametric tests (Kruskal-Wallis, Wilcoxon, Friedman, Spearman's Rho, etc) and show them how to set up, run, interpret, and report these tests using SPSS.
You can learn more about my course "Non-Parametric Analysis: A Step-by-Step Guide to Understanding and Conducting Non-Parametric Statistics in SPSS" at:
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[@simonewilcox4111]

Yay! Something that finally explained this in simple terms. Thank you.

[@samirkhan6195]

watched 7 different Videos for the same test by now, Everyone has different explanation with utterly different calculation , Could you please explain why ? and which one is appropriate ?

[@hanyomar8294]

Indeed, I have watched several videos concerning Mann-Whitney U test for interpretation of the values. However, your is the best. Thanks a lot.

[@shaillyagrawal9048]

Thanks :) but I also want to know how to find p-value for mann whitney. I think to find P-value first we need to find z and then by using calculated value of z we can find p-value either by using Excel or table. What is the exact formula to find z.

[@faithcole3394]

Amazing! Best explanation on UA-cam for this test

[@nhusain9665]

Could you help me understand that when the P value is being found of the distribution table how come n1 and n2 is chosen in that order. What I mean is why n1=4 and n2=3. It could have been n1=3 and n2=4 too. please help me understand.

[@stephenpryce5427]

Thank you for the video - this helped me get my university assignment back on track (y)

[@ashyxt]

sir you lost me at "this isn't a mistake" part, I misheard it as "this is a mistake" and spent half hour rewatching the whole thing again and again to find out wtf was wrong hahahaha, I'm just tired
and thank you for the concise video!!!

[@stephenpryce5427]

haha! Dying

[@clapathy]

Nice explanation thanks!

[@ProfHuseyinCengiz]

Amazing! Thank you

[@MrMarkgyuro]

really nice explanation thank u!!

[@kurtmcdonald7339]

You should sell quick reference guides that we can purchase as well. Including the little tidbits like when you said the U-score is unique in how it is interpreted compared to other statistical information.

[@namiirojose6824]

Thanks so much. You made it simple and clear

[@sherehanwahid3039]

Thank you so much for the simple explanation, this helped me with the analysis of my research!

[@PetroliumStation]

GREAT video!! Lays it out in a comprehensive and easy-to -follow step process without getting boring. Thank you for putting up this video!

[@morgigeadler]

Nice one, Mr Kent! Very well explained and your demeanor is very pleasant! Thanks

[@nhusain9665]

It was really helpful, could you help me understand the mean rank in your example and why it is important to have that.

[@loumelynrosebayato2467]

Thank you! Thank you! Thank you!

[@nhusain9665]

Could you help me understand that when the P value is being found of the distribution table how come n1 and n2 is chosen in that order. What I mean is why n1=4 and n2=3. It could have been n1=3 and n2=4 too. please help me understand.

[@Dentoz15]

The result would be the same, Whichever you pick

[@stephendarby8697]

This is great, ty

[@Flower4833]

Very helpful, thank you