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    hi, does anyone know where i can get a tableof critical values for mann-whitney u test which goes higher than 20. please its for my coursework and changes it dramatically, as i have 50 pieces of data in both conditions. im sooo desperate!
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    Hmm, tricky. Here's one that goes to thirty, for what good that will do: http://www.saburchill.com/IBbiology/downloads/002.pdf


    On a semi related note, here's a useful tool for doing M-W U! http://eatworms.swmed.edu/~leon/stats/utest.html
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    o wow thankyou that should be really helpful.
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    I'm no statistics expert, but usually when the numbers go above 20 you're recommended to use a Normal approximation for the Mann Whitney U test - a good stats book should help you out (this assumes you're familiar with the Normal distribution!!)

 
 
 

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