Задача N5355 теория вероятностей доверительный интервал

5355. x̅=88, n=859, σ=11. Find the confidence interval for estimating the mean of a normal distribution with a reliability of 0.920 given a sample mean of 88, a sample size of 859, and a standard deviation of 11.

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