An electronics manufacturing process has historically had a mean completion time of 75 minutes. It is claimed that, due to improvements in the process, the mean completion time, u, is now less than 75 minutes. A random sample of 13 completion times using the new process is taken. The sample has a mean completion time of 73 minutes, with a standard deviation of 9 minutes.

Assume that completion times using the new process are approximately normally distributed. At the 0.10 level of significance, can it be concluded that the population mean completion time using the new process is less than 75 minutes? Perform a one- tailed test. Then complete the parts below.

a) State the null hypothesis H0 and the alternative hypothesis H1

b) Determine the type of test statistics to use. Choose.

c)Find the value of the test statistic.

d) Find the p value.

e) can it be concluded that the mean completion time using the new process is less than 75 minutes? y or no