[math] TTestImpl

[Jo...@Actelion.Com]

I have some remarks about the TTestImpl class:

1) Is there a specific reason why ttest would throw an exception if there
is not sufficient data. In my case I would like to execute it with only 2
data (even if it does not mean anything). The developer should be smart
enough to make this test BEFORE calling the function if it really needed

2) I cannot find the functions for a homoscedastic or paired t-test (I
assumed the one that is implemented is for an unequal variance). There are
3 kinds of T-Tests and it is not clear to see which one is used. I would
love to see something like double ttest(double[] v1, double[] v2, int type)
where type is TTest.PAIRED or TTest.HOMOSCEDASTIC or TTest.HETEROSCEDASTIC


_________________________
Joel Freyss
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