Задача N5691 теория вероятностей объем выборки

5691. σ=1.2, 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 a of the population based on the sample mean is δ=0.2, if the standard deviation σ=1.2 of a normally distributed population is known.

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