Задача N5456 теория вероятностей доверительный интервал

5456. x̅=16.3, n=33, σ=1.3. Find the confidence interval for estimating with reliability γ=0.9 the unknown mathematical expectation a of a normally distributed feature X of the general population, if the general standard deviation σ=1.3, sample mean x̅=16.3, sample size n=33.

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