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pls help me Efficient manufacturing: Efficiency experts study the processes used to manufacture items in order to make them as efficient as possible. One of

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Efficient manufacturing: Efficiency experts study the processes used to manufacture items in order to make them as efficient as possible. One of the steps used to manufacture a metal clamp involves the drilling of three holes. In a sample of 85 clamps, the mean time to complete this step was 43.9 seconds. Assume that the population standard deviation is o = 11 seconds. Round the critical value to no less than three decimal places. Part 1 of 2 (a) Construct a 99.5% confidence interval for the mean time needed to complete this step. Round the answer to at least one olo decimal place. A 99.5% confidence interval for the mean is

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