1. The following data represents the age distribution of a sample of 100 people covered by health insurance (private or government). The sample was taken in 2003.

Age	Number
25 - 34	23
35 - 44	29
45 - 54	28
55 - 64	20

Find the mean, mode, and median of the grouped frequency distribution.

Age	Mid-value(x)	Number(f)	product	(fx)	Cumulative
25 - 34	29.5	23		678.5	23
35 - 44	39.5	29		1145.5	52
45 - 54	49.5	28		1386	80
55 - 64	59.5	20		1190	100
		100	4400

Mean = 4400/100 = 44

Mode = 35-44

Median = 35+(27/29)*9=35+8.4=43.4