R help - Apr 2008 - empirical null distribution

I simulated data for the ANOVA-test where the condition of equal variances
was not accomplished. 
I have three groups:
X<-rnorm(50,30,5)
Y<-rnorm(50,30,10)
Z<-rnorm(50,30,5)
(this is just an example....the variables might still change depending on
how clear the results are)

Now I want to construct the empirical null distribution of it.
How do I do this?
Can I make a graph of it?
Could I compare that graph with that of the theoretical null distribution?

Thanks a lot!
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mad_bassie <mad_bassie at hotmail.com> wrote in
news:16945981.post at talk.nabble.com: 
> 
> I simulated data for the ANOVA-test where the condition of equal
> variances was not accomplished. 
> I have three groups:
> X<-rnorm(50,30,5)
> Y<-rnorm(50,30,10)
> Z<-rnorm(50,30,5)
> (this is just an example....the variables might still change
> depending on how clear the results are)
> 
> Now I want to construct the empirical null distribution of it.
Assuming "it" is a hypothetical shared distribution that X, Y and Z
are
possibly all drawn from, then:

?stack
> How do I do this?
> Can I make a graph of it?
> Could I compare that graph with that of the theoretical null
> distribution? 
This is looking more and more like homework. Suggest you try some 
searches.

-- 
David Winsemius