Задача N5378 теория вероятностей доверительный интервал

5378. x̅=51, n=433, σ=23. Find the confidence interval for estimating the mean of a normal distribution with a reliability of 0.980 given a sample mean of 51, a sample size of 433, and a standard deviation of 23.

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