Problem N5424 probability theory confidence interval
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- x̅=75.12, n=121, σ=11. Find the confidence interval for estimating the mathematical expectation a of a normal distribution with a reliability of 0.95, knowing the sample mean x̅=75.12, the sample size n=121, and the standard deviation σ=11.
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Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)