Задача N5525 теория вероятностей доверительный интервал

5525. x̅=32.12, n=81, σ=3. γ=0.95 Find confidence intervals for estimating the mathematical expectation a of a normal distribution with a reliability of 0.95 if the sample mean x̅=32.12, the sample size n=81 and the standard deviation σ=3.

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