An electronics manufacturing process has a scheduled mean completion time of
minutes. It is claimed that, under new management, the mean completion time,
, is less than
minutes. To test this claim, a random sample of
completion times under new management was taken.
The sample had a mean completion time of
minutes and a standard deviation of
minutes. Assume that the population of completion times under new management is normally distributed. At the
level of significance, can it be concluded that the mean completion time,
, under new management is less than the scheduled mean?
Perform a one-tailed test. Then fill in the table below.
Carry your intermediate computations to at least three decimal places and round your answers as specified in the table.
Extracted text: An electronics manufacturing process has a scheduled mean completion time of 70 minutes. It is claimed that, under new management, the mean completion time, µ, is less than 70 minutes. To test this claim, a random sample of 20 completion times under new management was taken. The sample had a mean completion time of 65 minutes and a standard deviation of 10 minutes. Assume that the population of completion times under new management is normally distributed. At the 0.05 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 fill in the table below. Carry your intermediate computations to at least three decimal places and round your answers as specified in the table. н, :‑ The null hypothesis: H. :0 The alternative hypothesis: D=0 OSO (Choose one) The type of test statistic: O
0 The value of the test statistic: (Round to at least three decimal places.) The p-value: (Round to at least three decimal places.) At the 0.05 level, can it be concluded that the O Yes O No mean completion time under new management is less than the scheduled mean? Ix