5452. x̅=32.7, n=50, σ=2.1. Find the confidence interval for estimating with reliability γ=0.95 the unknown mathematical expectation a of a normally distributed feature X of the general population, if the general standard deviation σ=2.1, sample mean x̅=32.7, sample size n=50.
Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)
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