Thirty children were asked about the number of hours they watched TV programes in the previous week.
Question:
Thirty children were asked about the number of hours they watched TV programes 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, 2.
(i) Make a 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.
Solution:
(i) Class intervals will be 0 - 5, 5 - 10, 10 - 15 …
The grouped frequency distribution table is as follows:
(ii) The number of children who watched TV for 15 or more hours a week is 2(i.e number of children in class interval 15 - 20).