Thursday 19 December 2013

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

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