<PRE><B>Question 223690</B>
What information is necessary to calculate a confidence interval?
sample mean or sample proportion
standard error which depend on z or t, sigma or s, and n
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Is the size of the population relevant when one is determining the sample size for a confidence interval?
No
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What does increasing your level of confidence do to the interval estimate?
If you want the confidence to increase the interval estimate will increase
in size.
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Cheers,
Stan H.</PRE>