5694. σ=7.3, δ=23.7, γ=0.935. Find the minimum sample size at which, with reliability γ=0.935, the accuracy of estimating the mathematical expectation a of the population based on the sample mean is δ=23.7, if the standard deviation σ=7.3 of a normally distributed population is known.

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