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Formulas: Confidence Interval for the Population Mean (when population std dev is known)

Confidence Interval for the Population Mean (when population std dev is known) Formula

Below you will find descriptions and details for the 1 formula that is used to compute confidence intervals for a population mean when the population standard deviation is known.

Population mean confidence interval (when the population standard deviation is known):
Population mean confidence interval (when the population standard deviation is known) formula
where x is the sample mean, z is a standard normal score, α is the desired confidence level, σ is the population standard deviation, and n is the sample size.
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