Задача N5449 теория вероятностей доверительный интервал

5449. x̅=15.7, n=31, σ=2.3. Find the confidence interval for estimating with reliability γ=0.99 the unknown mathematical expectation a of a normally distributed feature X of the general population, if the general standard deviation σ=2.3, sample mean x̅=15.7, sample size n=31.

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