Re: Conficence Level Formula
- From: Jack Tomsky <jtomsky@xxxxxxxxxxxxx>
- Date: Mon, 30 Apr 2007 13:22:42 EDT
I have this formula in Excel that is used to
determine the sample size
needed to get a certain confidence level.
DOV = Degree of Variance
POP = Population Size
INTERVAL = Size of Interval
CONF = Confidence Level
INITSAMP = Sample Size
INITSAMP=
((DOV*(1-DOV)*POP)+(((INTERVAL/CONF)^2)*(POP-1)))/((DO
V*(1-
DOV))+(((INTERVAL/CONF)^2)*(POP-1)))
How do I redo this formula to solve for CONF?
Thanks in advance,
Laura
CONF = INTERVAL*Sqrt[{(POP-1)*(1+DOV*(1-DOV))}/{(INITSAMP-DOV*(1-DOV)*POP)*DOV*(1-DOV)}]
Jack
.
- References:
- Conficence Level Formula
- From: lhowey
- Conficence Level Formula
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