statistics

A simple random sample of 25 has been collected from a normally distributed population for which it is known that 17.0. The saMPLE MEAN HAS BEEN CALCULATED AS 342.0 AND THE sample standard deviation s=14.9. Construct and interpret the 95% and 99% confidence intervals for the population mean.

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  1. I don't know what the 17.0 signifies.

    95% interval = mean ± 1.96 SEm (Standard Error of the mean)

    SEm = SD/√(n-1)

    99% interval = mean ± 2.575 SEm

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