Thursday 19 December 2013

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


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