Задача N5598 теория вероятностей доверительный интервал

5598. x̅=17.5, n=55, σ=2.7. Find the confidence interval for the mathematical expectation a of a normally distributed quantitative attribute X of the general population with reliability γ=0.95, knowing the sample mean x̅в=17.5; sample size n=55 and standard deviation σ=2.7.

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