Задача N5374 теория вероятностей доверительный интервал

5374. x̅=14, n=217, σ=12. Find the confidence interval for estimating the mean of a normal distribution with a reliability of 0.970 given a sample mean of 14, a sample size of 217, and a standard deviation of 12.

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