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Old 04-26-2005, 12:43 PM
TEKEE TEKEE is offline
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Default CONFIDENCE %\'S

How large should your sample size be in order to gain your maximum confidence level? is 99.99% possible if so give me sample size to achieve this result please. thanks in advance
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Old 04-26-2005, 12:49 PM
elitegimp elitegimp is offline
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Default Re: CONFIDENCE %\'S

Sample size is related to the size of your interval, not the confidence of it. The bigger the sample size, the smaller your interval is.

For example (totally made up numbers):
You can have a 99.99% confidence interval of (0.3,3.7), and then increase your sample size so that the 99.99% confidence interval is (1.3,2.7)

Perhaps a better question would be: how big should my sample size be to have a 99.99% confidence interval of length 1? (and the answer will be "it depends on the standard deviation")
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