Problem N5700 probability theory sample size

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5700. σ=28.4, δ=9.2, γ=0.915. Find the minimum sample size at which, with reliability γ=0.915, the accuracy of estimating the mathematical expectation a of the population based on the sample mean is δ=9.2, if the standard deviation σ=28.4 of a normally distributed population is known.

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

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