Задача N5452 теория вероятностей доверительный интервал

5452. x̅=32.7, n=50, σ=2.1. 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=2.1, sample mean x̅=32.7, sample size n=50.

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