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A caliper is a device used to precisely measure the size of an object. To evaluate...

A caliper is a device used to precisely measure the size of an object. To evaluate a new design of caliper, an object with a known size is measured 4 times. The readings are 402mm, 405mm, 401mm, 398mm. Construct a 99% confidence interval for the variance of measurements from this caliper. Note: P X = 1606, P X2 = 644834.

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