Quote:
Originally posted by RawAlex@Oct 30 2004, 09:34 AM
I haven't had to figure it out before, but how many people have to be contacted to get a 1% error rate (19 times out 20!)?
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95% is two standard deviations so you need one standard deviation to be 1/2%.
sqrt(x)/x = .005
x^-.5 = 5/1000
1/x = (5/1000)^2
x = 40,000