Задача N5367 теория вероятностей доверительный интервал

5367. x̅=75, n=947, σ=26. Find the confidence interval for estimating the mean of a normal distribution with a reliability of 0.930 given a sample mean of 75, a sample size of 947, and a standard deviation of 26.

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