Re: Welch's t test

https://www.ncl.ucar.edu/Document/Functions/Built-in/ttest.shtml

See the iflag description

*iflag*

Set to False if the two original samples are assumed to have the same
population variance. Set to True if the two original samples are assumed to
have different population variances. The latter applies applies the Welsh
degree-of-freedom modification (Welsh's t-test).



On Fri, Jul 11, 2014 at 8:21 AM, Verena Lili <verena.prick@gmail.com> wrote:

> Hallo,
>
> I'm just wondering whether the Welch's t test is already implemented in
> NCL or it is the same as the subroutine of t-test with an option of unequal
> variance from two populations?
> Thanks
>
>
> --
> Regards,
> Dr. Verena.
> School of Marine and Atmospheric Sciences
> Stony Brook University
> homepage: http://www.somas.stonybrook.edu/
>
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Received on Fri Jul 11 03:57:31 2014