STATISTICS A1

50 families were asked to record the number of children each family had. The results were recorded as follows:

No of children	0	1	2	3	4	5	6	7	8
No of families	2	4	5	8	10	9	6	4	2

Calculate the mean.

Solution

No of children (x)	Frequency(f)	fx
0	2	0
1	4	4
2	5	10
3	8	24
4	10	40
5	9	45
6	6	36
7	4	28
8	2	16
∑f= 50	∑fx= 203

Mean = ∑fx

               ∑f

Mean = 203

               50

Mean =  4.06

         

Hence Mean =  4.06