$30$ children were asked about the number of hours they watched $TV$ programmes last week. The results are recorded as under:
Number of hours $0-5$ $5-10$ $10-15$ $15-20$ Frequency $8$ $16$ $4$ $2$
Can we say that the number of children who watched $TV$ for $10$ or more hours a week is $22$? Justify your answer.
| Number of hours | $0-5$ | $5-10$ | $10-15$ | $15-20$ |
| Frequency | $8$ | $16$ | $4$ | $2$ |
Can we say that the number of children who watched $TV$ for $10$ or more hours a week is $22$? Justify your answer.
- AYes
- BNo
- CCannot be determined
- DNone of these
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Similar Questions
The number of books in different shelves of a library are as follows:
$37, 22, 24, 27, 28, 27, 20, 36, 21, 20,$
$29, 30, 29, 36, 30, 25, 27, 32, 24, 28,$
$34, 20, 25, 28, 30, 20, 35, 25, 27, 31$
Represent the data given above by a grouped frequency distribution table,taking the class intervals as $18-22, 22-26, 26-30, 30-34, 34-38$.
$37, 22, 24, 27, 28, 27, 20, 36, 21, 20,$
$29, 30, 29, 36, 30, 25, 27, 32, 24, 28,$
$34, 20, 25, 28, 30, 20, 35, 25, 27, 31$
Represent the data given above by a grouped frequency distribution table,taking the class intervals as $18-22, 22-26, 26-30, 30-34, 34-38$.
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View SolutionIn the class intervals $10-20$ and $20-30$,the number $20$ is included in:
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View SolutionRepresent the following data by means of a histogram:
Class $0-5$ $5-10$ $10-20$ $20-30$ $30-50$ $50-70$ Frequency $5$ $7$ $12$ $16$ $24$ $16$
| Class | $0-5$ | $5-10$ | $10-20$ | $20-30$ | $30-50$ | $50-70$ |
|---|---|---|---|---|---|---|
| Frequency | $5$ | $7$ | $12$ | $16$ | $24$ | $16$ |
The mean of the $10$ observations is $11$. If one new observation is included,their mean becomes $12$. The included new observation is ........
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View SolutionIn a histogram, the areas of the rectangles are proportional to the frequencies. Can we say that the lengths of the rectangles are also proportional to the frequencies?
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