(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).