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Problem N5423 probability theory confidence interval

Problem N5423 probability theory confidence interval

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  • x̅=75.11, n=144, σ=12. 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=75.11, the sample size n=144, and the standard deviation σ=12.

Additional information

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