Question

.Given this data, what is the mean, median and mode? Show how you got the results (formulas). Use Excel or another program to create a bar chart and explain the chart in words.

Age	Number (frequency) of cases of Disease x
40-44	2
45-49	7
50-54	13
55-59	12
60-64	7
65-69	3

Answer 1

Ans:

Age	mid point,x	frequency of cases,f	x*f
40-44	42	2	84
45-49	47	7	329
50-54	52	13	676
55-59	57	12	684
60-64	62	7	434
65-69	67	3	201
Total		44	2408
		mean=	54.73

mean=2408/44=54.73

Total number of cases=44

median will be between 22^nd and 23^rd data value.

median is between 54 and 55,so median=54.5,as it divides the data into two equal halves(i.e. 44/2=22)

mode lies in the class 50-54,as it has the highest frequency i.e. 13