[SciPy-Dev] Independent T-tests with unequal variances
Mon Apr 30 20:11:47 CDT 2012
Well, this is embarrassing. I appear to have sent the wrong diff with a
sign error in it. The correct one is attached.
On 4/30/2012 5:12 PM, Junkshops wrote:
> Hello all,
> 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
> 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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