Problem N5713 probability theory sample size

Problem N5713 probability theory sample size

5713. σ=1.1, δ=0.08, γ=0.90 Find the minimum sample size at which, with a reliability of 0.90, the accuracy of estimating the mathematical expectation of a normally distributed population based on the sample mean is 0.08, if the mean is known the quadratic deviation of the general population σ=1.1.

Additional information:

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