STATISTICS A2

100 presidents were asked to give out the number of priority areas during election. The results were recorded as follows:

No of priority areas	1	2	3	4	5	6	7	8	9
No of presidents	4	8	10	16	20	18	12	8	4

Calculate the mean.

Solution

No of priorities (x)	Frequency(f)	fx
1	4	4
2	8	16
3	10	30
4	16	64
5	20	100
6	18	108
7	12	84
8	8	64
9	4	36
	∑f = 100	∑fx = 506

Mean = ∑fx

               ∑f

Mean = 506

               100

Mean =  5.06

         

Hence Mean =  5.06