Problem N5558 probability theory confidence interval

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5558. x̅=119.5, n=16, σ=17. Given the standard deviation σ=17, the sample mean x̅в=119.5 and the sample size n=16 of a normally distributed feature of the general population. Find confidence intervals for estimating the general mean x̅g with a given reliability γ=0.95.
Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)