[SciPy-user] help with scipy.stats.mannwhitneyu

Wavy Davy bloodearnest@gmail....
Thu Feb 5 05:37:47 CST 2009


Hi all

I am using the mannwhitneyu in the stats module, and I was looking the
code and I see this notice in the docstring.

"Use only when the n in each condition is < 20 and you have 2
independent samples of ranks. "

Am I reading it correctly that this test should only be used with
sample sizes less than 20?

I am not a statistican, more a python coder. I have been pointed and
this test as a more robust version of the t-test, so forgive my
ignorance.

Any help would be much appreciated.

-- 
Simon


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