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A Random Sample of 11 Copies of a Particular Mechanical 0.60\mathbf{0 . 6 0}

Question 31

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A random sample of 11 copies of a particular mechanical component has a mean length of 5 inches with a standard deviation of 0.60\mathbf{0 . 6 0} .
-Find a 90%90 \% confidence interval for the population variance.

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