Clark Heter is an industrial engineer at Lyons Products. Hewould like to determi

Clark Heter is an industrial engineer at Lyons Products. Hewould like to determine whether there are more units produced onthe afternoon shift than on the day shift. A sample of 54 day-shiftworkers showed that the mean number of units produced was 345 witha standard deviation of 21. A sample of 60 afternoon-shift workersshowed that the mean number of units produced was 351 with astandard deviation of 28 units. At the .05 significance level isthe number of units produced on the afternoon shift larger?