Задача N5422 теория вероятностей доверительный интервал

5422. x̅=75.10, n=169, σ=13. Find the confidence interval for estimating the mathematical expectation a of a normal distribution with a reliability of 0.95, knowing the sample mean x̅=75.10, the sample size n=169, and the standard deviation σ=13.

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