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One of the steps used to manufacture metal clamp involves the drilling of 3 holes. In a sample 67 clamps the mean time the it
One of the steps used to manufacture metal clamp involves the drilling of 3 holes. In a sample 67 clamps the mean time the it took 44.0 seconds to finish. Assume population standard deviation is 7 seconds what is the lower bound of 98% confidence interval?
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