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An electronics manufacturing process has historically had a mean completion time of 75 minutes It...

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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 is now less than 75 minutes A random sample of 14 completion times using the new process is taken The sample has a mean completion time of 72 minutes with a standard deviation of 9 minutes Assume that completion times using the new process are approximately normally distributed At the 0 05 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 Carry your intermediate computations to three or more decimal places If necessary consult a list of formulas a State the null hypothesis Ho and the alternative hypothesis H H 0 H 0 b Determine the type of test statistic to use Choose one c Find the value of the test statistic Round to three or more decimal places 0 d Find the p value Round to three or more decimal places e Can it be concluded that the mean completion time using the new process is less than 75 minutes Yer No x X 0 0 X O S 2 OSO O O P Q G 010 020 0 0

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