[R-sig-teaching] Distribution of the T test statistic under H0 and Ha

[Greg Snow]

The power.examp function in the TeachingDemos package compares normal
distributions from a null and alternative hypothesis (the
run.power.examp function provides a GUI for the function).  The
normals could be replaced with a T and non-central T distribution (on
my to do list, I actually have contributed code for this, just have
not incorporated it yet).

On Sun, Apr 15, 2012 at 9:14 AM, Ali Zanaty <zanaty2005 at yahoo.com> wrote:
> Dear All:
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> I need a quick help in R. How I can plot plot the distribution of the T test
> statistic under Ho and Ha with shading areas. Plot overlapping two T distributions and shading overlapping areas under both curves. You choose any values just
>  for example. I could not upload any graph for example.
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> Once I know how to create this one, I think I will be able to create the one for normal case.
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> Thank you very much and sorry for bothering.
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> Ali
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>        [[alternative HTML version deleted]]
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-- 
Gregory (Greg) L. Snow Ph.D.
538280 at gmail.com