Problem N5355 probability theory confidence interval

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5355. x̅=88, n=859, σ=11. Find the confidence interval for estimating the mean of a normal distribution with a reliability of 0.920 given a sample mean of 88, a sample size of 859, and a standard deviation of 11.

Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)

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