Задача N5573 теория вероятностей доверительный интервал

5573. x̅=25, n=400, σ=5. Determine the confidence interval for estimating with reliability γ=0.995 the unknown mathematical expectation a of the normally distributed feature X of the general population, if the sample mean x̅в=25, the sample size n=400 and the general standard deviation σ=5 are known.

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