Problem N5433 probability theory confidence interval
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5433. x̅=14, n=25, σ=5. Find the confidence interval for estimating with reliability γ=0.95 the unknown mathematical expectation a of a normally distributed feature X of the general population, if the general standard deviation σ=5, the sample mean x̅v=14 and the sample size n=25.
Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)