Question

Thirty children were asked about the number of hours they watched T.V. programmers in the previous week. The results were found as follows:

(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? 

Answer 1

(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).