Clark Heter is an industrial engineer at Lyons Products. He would like to determ
ID: 3437781 • Letter: C
Question
Clark Heter is an industrial engineer at Lyons Products. He would like to determine whether there are more units produced on the night shift than on the day shift. A sample of 56 day-shift workers showed that the mean number of units produced was 338, with a population standard deviation of 24. A sample of 62 night-shift workers showed that the mean number of units produced was 343, with a population standard deviation of 31 units.
The test statistic is Z = . (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.)
Reject or do not reject?
At the .05 significance level, is the number of units produced on the night shift larger?Explanation / Answer
1) One tailed test.(as claim is more units produced at night)
2) The decision rule is reject H0 if Z<1.645
3) Mean diff = - 5
The two samples are not significantly different.
Day shift average less than night shift average has no statistical evidence.
z-value -0.9846 4) one-tailed p-value 0.1624