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 5and one of the class intervals as 5 - 10.
(ii) How many children watched television for 15 or more hours a week?
The parts of the questions are solved below:
(i) The distribution table for the given data, taking class width 5 and one of the class intervals as 5-10 is as follows:
NUMBER OF HOURS | FREQUENCY |
0-5 | 10 |
5-10 | 13 |
10-15 | 5 |
15-20 | 2 |
Total | 30 |
(ii) We conclude from the given table that two children watch television for 15 or more hours a week.