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The diameters (in inches) of 17 randomly selected bolts produced by a machine are listed. Use a 90% level of confidence to construct a confidence interval for (a) the population variance of and (b) the population standard deviation o. Interpret the results. 4.482 4.435 4.028 4.351 4.006 3.784 D 3.806 3.752 4.246 3.966 4.117 4.544 3.961 3.765 3.859 3.834 4.441 a) The confidence interval for the population variance is (Round to three decimal places as needed.)