Problem N5450 probability theory confidence interval
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5450. x̅=13.3, n=26, σ=1.4. Find the confidence interval for estimating with reliability γ=0.99 the unknown mathematical expectation a of a normally distributed feature X of the general population, if the general standard deviation σ=1.4, sample mean x̅=13.3, sample size n=26.
Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)