A machine is supposed to cut plastic into sheets that are 600 inches long. The company wants to estimate the mean length the machine is cutting the plastic, accurate to within 0.04 inch. Determine the...

A machine is supposed to cut plastic into sheets that are 600 inches long. The company wants to estimate the mean length the machine is cutting the plastic, accurate to within 0.04 inch. Determine the sample size required to construct a 92% confidence interval. Assume that the population is normal with a standard deviation of 0.25 inch. (a) 120 (b). 32 (c). 100 (d). 945 (e). 115