Задача N5358 теория вероятностей доверительный интервал

5358. x̅=89, n=107, σ=27. Find the confidence interval for estimating the mean of a normal distribution with a reliability of 0.920 given a sample mean of 89, a sample size of 107, and a standard deviation of 27.

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