Question

Thirty children were asked about the number of hours they watched TV programmes in the previous week. The results were found as under:
8, 4, 8, 5, 1, 6, 2, 5, 3, 12, 3, 10, 4, 12, 2, 8, 15, 1, 6, 17, 5, 8, 2, 3, 9, 6, 7, 8, 14, 12.
(i) Make a grouped frequency distribution table for this data, taking class width 5 and one of the class interval as 5 –10.
(ii) How many children watched television for 15 or more hours a week?

Answer 1

(i)

Class interval	tally marks	Frequency
0-5		10
5-10		13
10-15		5
15-20		2

(ii) As we can see from the table, there are 2 children who watched tv for 15 hours or more.