Задача N5520 теория вероятностей доверительный интервал

5520. x̅=74.55, n=46, σ=13 Find the confidence interval for estimating the expectation a of a normal distribution with reliability γ=0.95, knowing the sample mean x̅=74.55, sample size n=46 and root mean square deviation σ=13.

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