Question: 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

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 70 clamps, the mean time to complete this step was 46.8 seconds. assume that the population standard deviation is 9 seconds. What is the lower bound 98% confidence interval? Round your answer to one decimal place.

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