With reference to the previous exercise, construct a 95% confidence interval for the true population mean labor time.

Data From Previous Exercise

7.3 An industrial engineer collected data on the labor time required to produce an order of automobile mufflers using a heavy stamping machine. The data on times (hours) for n=52 orders of different parts 2.15 2.27 0.99 0.63 2.45 1.30 2.63 2.20 0.99 1.00 1.05 3.44 0.49 0.93 2.52 1.05 1.39 1.22 3.17 0.85 1.18 2.27 1.52 0.48 1.33 4.20 1.37 2.70 0.63 1.13 3.81 0.20 1.08 2.92 2.87 2.62 1.03 2.76 0.97 0.78 4.68 5.20 1.90 0.55 1.00 2.95 0.45 0.70 2.43 3.65 4.55 0.33 = 1.5623 so s = 1.250 has = 1.865 hours and s hours. What can one assert with 95% confidence about the maximum error if x = 1.865 hours is used as a point estimate of the true population mean labor time required to run the heavy stamping machine?