[R-sig-ME] Multilevel Probability Question

[Martin Henry H. Stevens]

If you aren't stratifying by school, then isn't it just the  
probability of drawing 120 teachers out of 2000?
-Hank
On Jun 11, 2007, at 4:37 PM, Roberts, J. Kyle wrote:

> Dear Friends,
>
> I sent the following to the multilevel listserv, but thought that  
> some of you might actually have code to compute this in R.  If you  
> do, please let me know.
>
> I have an odd question. I am trying to compute the probability of  
> drawing 120 teachers from a sample of 2000 teachers in 400 schools  
> where no two teachers work at the same school. Assume that there  
> are 5 teachers at each school, evenly spread. I was trying to do  
> this with an "n choose k" type
> situation, but I can't figure out how to include the part about  
> only 5 teachers can be at any given school. Any ideas? I am not  
> stratifying on school, just sampling teachers.
>
> Thanks,
>
> Kyle
>
>
> ***************************************
> J. Kyle Roberts, Ph.D.
> Baylor College of Medicine
> Center for Educational Outreach
> One Baylor Plaza, MS:  BCM411
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