5391. x̅=84.26, n=100, σ=10. Find confidence intervals for estimating the mathematical expectation a of a normal distribution with a reliability of 0.95, knowing the sample mean x̅=84.26, the sample size (number of observations) n=100, and the standard deviation σ=10.
Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)
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