Re: questions on hypothesis

[Ting Ting]

> 
> A good example of a simple situation for which exact P values are
> unavailable is the Behrens-Fisher problem (testing the equality of
> normal means from normal populations with unequal variances).  Some
> might say we have approximate solutions that are good enough.
> 
would u pls give some more detail examples about this?
thx


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