[ncl-talk] ttest

[Dennis Shea]

*http://www.ncl.ucar.edu/Document/Functions/Built-in/ttest.shtml*
<http://www.ncl.ucar.edu/Document/Functions/Built-in/ttest.shtml>

The documentation *answers your question:*

*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 the Welsh
degree-of-freedom modification (Welsh's t-test). *

On Mon, Mar 29, 2021 at 6:45 AM Chathurika via ncl-talk <
ncl-talk at mailman.ucar.edu> wrote:

>
> Dear all,
>
>
> If I use 'ttest' with '*iflag=True',*
>
>     Does this run the Welsh's t-test ?
>
>
> Thank you so much and best regards,
>
> Chathu
>
> ------------------------------
>
>
>
> Wickramage Chathurika Hemamali
> Msc in Physical Oceanography
> State Key Laboratory of Tropical Oceanography
> South China Sea Institute of Oceanology
> University of Chinese Academy of Science
> China
>
> *Specialized in Oceanography and Marine Geology (Bachelor)*
> *University of Ruhuna*
> *Matara*
> *Sri Lanka*
>
> Email : wickramagechathurika at rocketmail.com
> chatu at scsio.ac.cn
>
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