Clark Heter is an industrial engineer at Lyons Products. He would like to determine whether there are more units produced on the afternoon shift than on the day shift. A sample of 54 day-shift workers showed that the meannumber of units produced was 345, with a standard deviationof 21. A sample of 60 afternoon-shift workers showed that the mean number of units produced was 351, with a standard deviation of 28 units.
At the .05 significance level, is the number of units produced on the afternoon shift larger?
Please see attached file.
Rejection Criteria: Reject the null hypothesis if the calculated value of t is …
The solution examines whether there is any significant difference in the number of items produced is different between forenoon and after noon shifts. Independent sample t test is applied.