Задача N5395 теория вероятностей доверительный интервал

5395. x̅=84.30, n=36, σ=6. Find confidence intervals for estimating the mathematical expectation a of a normal distribution with a reliability of 0.95, knowing the sample mean x̅=84.30, the sample size (number of observations) n=36, and the standard deviation σ=6.

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