Задача N5433 теория вероятностей доверительный интервал

5433. x̅=14, n=25, σ=5. 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=5, the sample mean x̅v=14 and the sample size n=25.

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