Thirty children were
asked about the number of hours they watched TV programmes in the
previous week. The results were found as follows:
1 6 2 3 5 12 5 8
4 8
10 3 4 12 2
8 15 1 17 6
3 2 8 5 9 6
8 7 14 12
(i) Make a grouped frequency distribution table for this data, taking
class width 5 and one of the class intervals as 5 - 10.
(ii) How many children
watched television for 15 or more hours a week?
Thirty children were asked about the number of hours they watched TV programmes in the previous week. The results were found as follows:
1 6 2 3 5 12 5 8 4 8
10 3 4 12 2 8 15 1 17 6
3 2 8 5 9 6 8 7 14 12
(i) Make a grouped frequency distribution table for this data, taking class width 5 and one of the class intervals as 5 - 10.
(ii) How many children watched television for 15 or more hours a week?
(i) Our class intervals
will be 0 − 5, 5 − 10, 10 −15…..
The
grouped frequency distribution table can be constructed as follows.
-
Hours
Number of children
0 − 5
10
5 − 10
13
10 − 15
5
15 − 20
2
Total
30
(ii) The number of children who watched TV for 15 or more hours a
week is 2 (i.e., the number of children in class interval 15 −
20).
(i) Our class intervals will be 0 − 5, 5 − 10, 10 −15…..
The grouped frequency distribution table can be constructed as follows.
-
Hours
Number of children
0 − 5
10
5 − 10
13
10 − 15
5
15 − 20
2
Total
30
(ii) The number of children who watched TV for 15 or more hours a week is 2 (i.e., the number of children in class interval 15 − 20).
