Gcse Exam Questions On Cumulative Frequency (Grade B) Page 5
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10Cumulative
frequency
130
120
110
100
90
80
70
60
50
40
30
20
10
0
60 000
80 000
100 000
120 000
140 000
160 000
180 000
200 000
Prices of houses (£)
The table shows information about the number of hours that 120 children used a computer last
5.
week.
Number of hours
Frequency
( h )
0 < h ≤ 2
10
2 < h ≤ 4
15
4 < h ≤ 6
30
6 < h ≤ 8
35
8 < h ≤ 10
25
10 < h ≤ 12
5
(a)
Work out an estimate for the mean number of hours that the children used a computer.
Give your answer correct to two decimal places.
………………hours
(4)
LILIAN BAYLIS TECHNOLOGY SCHOOL
5
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