The city manager of Grosse Out Pointe wants to make sure that pay raises are distributed fairly to all employees. He asks his assistant to gather data on raises for a random sample of police and fire employees because he has received complaints that raises are not being distributed fairly in one of the departments.
The assistant calculates the mean for each group of employees. He tells the city manager that because the average pay raise is just about the same in each department, there is really no fairness issue to worry about. If you were the city man-ager, would you accept these results, or would you ask the assistant to provide you with more information? Explain.
Police Fire
610 ………………. 570
590 ………………. 580
650 ………………. 700
650 ………………. 600
640 ………………. 480
580 ………………. 690
550 ………………. 740
550 ………………. 450
 = 603 …………..  = 601