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 <[email protected]> wrote: > Dear All: > > > > > > 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. > > > > > > Once I know how to create this one, I think I will be able to create the one > for normal case. > > > > Thank you very much and sorry for bothering. > > > > Ali > > > [[alternative HTML version deleted]] > > _______________________________________________ > [email protected] mailing list > https://stat.ethz.ch/mailman/listinfo/r-sig-teaching -- Gregory (Greg) L. Snow Ph.D. [email protected] _______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-sig-teaching
