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#125987 - 13/11/2002 16:57 Statistical Analysis
muzza
Pooh-Bah

Registered: 21/07/1999
Posts: 1765
Loc: Brisbane, Queensland, Australi...
Does anyone have a formula for finding the number of samples to take of a population in order to have a specified amount of certainty of a specified error rate?

the only equation I have at the moment doesn't deal with the initial size of the population to sample. So whether I have 5 million in the population or just 5, I should take a sample of 384 in order to have 95% assurance of being correct.
Strange huh?
_________________________
-- Murray I What part of 'no' don't you understand? Is it the 'N', or the 'Zero'?

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#125988 - 13/11/2002 18:37 Re: Statistical Analysis [Re: muzza]
wfaulk
carpal tunnel

Registered: 25/12/2000
Posts: 16706
Loc: Raleigh, NC US
Something here is bound to help.
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Bitt Faulk

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#125989 - 13/11/2002 20:03 Re: Statistical Analysis [Re: muzza]
jimhogan
carpal tunnel

Registered: 06/10/1999
Posts: 2591
Loc: Seattle, WA, U.S.A.
It is so funny that you should ask on this last night of ths particular project. Someday I'll explain.

I am misapplying this tool (from our friendly, socialistic, non-Libertarian CDC) at this very moment to run some crude statistical tests. It includes a module (and old DOS program really) called Statcalc that includes a sample size estimator. You may be able to just download the Statcalc bit.

Oh, do I wish we had money for SAS!
_________________________
Jim


'Tis the exceptional fellow who lies awake at night thinking of his successes.

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