[SciPy-Dev] Independent T-tests with unequal variances
Mon Apr 30 19:12:51 CDT 2012
I hope, as an utter newb poking my nose into this list, that I'm not
giving the author of Miss Manner's Book of Netiquette the vapours.
This is a follow up to Deniz Turgut's recent email:
"There is also a form of t-test for independent samples with different
variances, also known as Welch's t-test . I think it is better to
include the 'identical variance' assumption in the doc to avoid confusion."
I was just caught by this problem and heartily agree with Deniz's views.
However, I didn't see any explicit plans to add Welch's test to
scipy/stats/stats.py, and I needed an implementation of the test and so
implemented it. A diff against scipy 0.10.1 is attached if anyone might
find it useful.
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