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The diameters(in inches) of 17 randomly selected bolts produced by a machine are listed. Use a 99% level of confidence to construct a confidence interval

The diameters(in inches) of 17 randomly selected bolts produced by a machine are listed. Use a 99% level of confidence to construct a confidence interval for (a) the population variance 2 and (b) the population standard deviation . Interpret the results.

4.471 4.419 4.014 4.309 4.008 3.781

3.811 3.761 4.224 3.978 4.143 4.569

3.963 3.741 3.869 3.833 4.479

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