Problem N5718 probability theory sample size

Problem N5718 probability theory sample size

5718. σ=2, δ=0.3, γ=0.96. Find the minimum sample size at which, with a reliability of γ=0.96, the accuracy of estimating the mathematical expectation of the population based on the sample mean will be δ=0.3, if it is known that the standard deviation of the normal population is σ=2.

Additional information:

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