Efficiency experts study the processes used to manufacture items in order to make them as efficient as possible.

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 75 clamps, the mean time to complete this step was 41.4 seconds. Assume that the population standard deviation is =σ 12 seconds. Round the critical value to no less than three decimal places.

98%

(a) Construct a confidence interval for the mean time needed to complete this step. Round the answer to at least one decimal place.

A

98%

confidence interval for the mean is

<<μ

.

Expert Solution

Confidence Interval Calculation:

98% confidence interval for the mean is

38.177 < μ < 44.623

orchestra answered 2 years ago

Efficiency experts study the processes used to manufacture items in order to make them as efficient as possible

Efficient manufacturing:(please make answer clear ) 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 75 clamps, the mean time to complete this step was 41.4 seconds. Assume that the population standard deviation is =σ 12 seconds. Round the critical value to no less than three decimal places. (b) Find the...

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