Задача N5521 теория вероятностей доверительный интервал

5521. x̅=60, n=256, σ=12 Find the confidence interval for estimating the mathematical expectation of a normal distribution with a reliability of 0.95, knowing the sample mean x̅=60, the sample size n=256, and the standard deviation σ=12.

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