Задача N5689 теория вероятностей объем выборки

5689. σ=2.5, δ=0.2, γ=0.975 Find the minimum sample size at which, with reliability γ=0.975, the accuracy of estimating the mathematical expectation of a normally distributed population based on the sample mean is δ=0.2, if the mean is known standard deviation σ=2.5 of a normally distributed population.

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