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Thirty children were asked about the ...

Thirty children were asked about the number of hours they watched T.V. 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 Make a grouped frequency distribution table for this data, taking class width 5 and one of the class intervals as 5-10 How many children watched television for 15 or more hours a week?

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Hours f
0-5 10
5-10 13
10-15 5
15-20 2
2 children watch TV for more than 15 hours.
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