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Confidence Interval Assignment | Professional Writing Services

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December 10th, 2019

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.

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In a sample of 78 clamps , the mean time was 43.5 seconds. Assume that the population standard deviation is 10 seconds. What is the lower bound of the 98% confidence interval?

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