[R] Algorithms for coincidences

[Doran, Harold]

Thank you, Greg. In part, that's what I'm poking around for. I'm
wondering if there are any adaptations to clustered situations. I have
that paper below since it is the reference in qbirthday(), but haven't
found anything that has adapted this further. 

> -----Original Message-----
> From: r-help-bounces at r-project.org 
> [mailto:r-help-bounces at r-project.org] On Behalf Of Greg Snow
> Sent: Tuesday, November 06, 2007 4:23 PM
> To: Doran, Harold; r-help
> Subject: Re: [R] Algorithms for coincidences
> 
> A paper that may help you:
> 
> "Methods for Studying Coincidences", Persi Diaconis; 
> Frederick Mosteller.  Journal of the American Statistical 
> Association, vol 84, no.
> 408 (Dec., 1989), 853-861.
> 
> And remember that the birthday problem assumes independence, 
> but if you have 2 students that studied together 
> (legitimately) then we would not expect their scores to be 
> independent.
> 
> Hope this helps,
> 
> --
> Gregory (Greg) L. Snow Ph.D.
> Statistical Data Center
> Intermountain Healthcare
> greg.snow at intermountainmail.org
> (801) 408-8111
>  
>  
> 
> > -----Original Message-----
> > From: r-help-bounces at r-project.org
> > [mailto:r-help-bounces at r-project.org] On Behalf Of Doran, Harold
> > Sent: Tuesday, November 06, 2007 12:10 PM
> > To: r-help
> > Subject: [R] Algorithms for coincidences
> > 
> > I'm looking at algorithms for determining coincidences. In 
> educational 
> > testing, it is interesting to look at cheating via the birthday 
> > problem where I can assess the probability of n students having the 
> > same test score in a class of size k.
> > 
> > I was writing my own code for the b-day problem until I ran into the
> > qbirthday() function, which has solutions for the overflow 
> problems I 
> > kept running into. There is no "see also" part of this man 
> page which 
> > would reference me to other functions which may prove 
> useful for such 
> > problems. But, that doesn't mean they don't exist.
> > 
> > I am just not familiar enough with this branch of 
> mathematics to know 
> > exactly what else I might look for. Does anyone know of any other R 
> > functions that may be useful for me to look at in thinking 
> about this 
> > kind of problem?
> > 
> > Harold
> > 
> > 	[[alternative HTML version deleted]]
> > 
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> 
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