Задача N5417 теория вероятностей доверительный интервал

5417. x̅=20.01, n=36, σ=7. Given the standard deviation σ=7 of a normally distributed random variable X, sample mean x̅=20.01, sample size n=36. Find confidence intervals for estimating the unknown mathematical expectation a with a given reliability γ=0.95.

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