A metal bolt is to be inserted into a hole. A random sample of n 16 parts is selected, and the hole diameter is measured. The sample standard deviation of the hole diameter measurements is s = 0.008 millimeters. Construct a 95% lower confidence bound on the variance. Oa. 0.00619677 so b. 0.00003840 so2 C. 0.00003075 so2 d. None of the above

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