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Problem N5540 probability theory confidence interval

Problem N5540 probability theory confidence interval

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Product description

  • x̅=25.22, n=81, σ=6. The standard deviation σ=6 of a normally distributed random variable X, the sample mean x̅v=25.22, and the sample size n=81 are given. Find the confidence interval for estimating the unknown mathematical expectation a with a given confidence probability γ=0.95.

Additional information

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