1. In chapter 2 we learn about frequency tables which are a way for us to summarize our data in a form that is easily understood. Compute the proportion for each interval and the percentage of the data in that interval.

Years of service	Number of employees	Proportion	Percent
1 - 5	35	35/95=0.3684	36.84
6 - 10	15	0.1578	15.78
11 - 15	25	0.2631	26.31
16 - 20	5	0.0526	5.26
21 - 25	10	0.1052	10.52
26 - 30	5	0.0526	5.26
Sum	95

1. Identify the midpoint for the following frequency table. Then multiply the midpoint by the frequency (fx).

Age	frequency	Midpoint (x)	fx
21 - 30	18
31 - 40	12
41 - 50	10
51 - 60	9
61 - 70	14
71 - 80	5

1. Review the frequency table below. What issues can you identify with it?

Years	Number of employees
10 - 15	15
15 - 20	35
20 - 25	20
30 - 35	5
40 - 45	15
60 - 65	5

1. Review the chart below. What is the level of measurement for the data that it is displaying? Is it the correct type of chart for that type of data? Are there any problems you can see with the chart? If so; what are they?

Customer Satisfaction with Service Ranking for Retail Stores 10 5 20 15 50