An elec s manuracturing process nas a schedured mean completion time or 75 minutes. It is claimed that, under new management, the mean completion time, u, 1o icSs than 75 minutes. To test this claim,...

Extracted text: An elec s manuracturing process nas a schedured mean completion time or 75 minutes. It is claimed that, under new management, the mean completion time, u, 1o icSs than 75 minutes. To test this claim, a random sample of 22 completion times under new management was taken. The sample had a mean completion time of 71 minutes and a standard deviation of 10 minutes. Assume that the population of completion times under new management is normally distributed. At the 0.1 level of significance, can it be concluded that the mean completion time, µ, under new management is less than the scheduled mean? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places and round your answers as specified in the table. (If necessary, consult a list of formulas.) (a) State the null hypothesis H and the alternative hypothesis H,. H, :0 H, :0 (b) Determine the type of test statistic to use. (Choose one) ▼ O=0 OSO (c) Find the value of the test statistic. (Round to three or more decimal places.) O