Задача N5500 теория вероятностей доверительный интервал

5500. Find the confidence interval for estimating the mathematical expectation m of the normal law with a reliability of 0.9; knowing the sample mean x̅=98, n=120, σ=16, γ=0.9.

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