Thirty children were asked about the number of hours they watched T.V. 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) Class intervals will be 0-5, 5-10, 10-15,…
The grouped frequency distribution table is as follows:
Hours | No. of children |
0-5 | 10 |
5-10 | 13 |
10-15 | 5 |
15-20 | 2 |
Total = 30 |
(ii) The number of children, who watch T.V. for 15 or more hours a week is 2 (i.e. no. of children in class interval 15-20)