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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?
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?
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Solution
(i)
Number of hours TV No.of children 0-5 10 5-10 13 10-15 5 15-20 2 Total 30
(ii)
No.of children watched television for 15 or more hours a week = 2
Number of hours TV No.of children | 0-5 | 10 |
| 5-10 | 13 |
| 10-15 | 5 |
| 15-20 | 2 |
| Total | 30 |
(ii)
No.of children watched television for 15 or more hours a week = 2
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