Question 730 children were asked about the number of hours they watched TV programs 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 hour in a week is 22- Justify your answer-

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Standard VIII

Mathematics

Frequency

Question 730 ...

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Question 7
30 children were asked about the number of hours they watched TV programs last week. The results are recorded as under:

$\begin{matrix} Number of hours & 0 - 5 & 5 - 10 & 10 - 15 & 15 - 20 Frequency & 8 & 16 & 4 & 2 \end{matrix}$

Can we say that the number of children who watched TV for 10 or more hour in a week is 22? Justify your answer.

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Solution

No, it is not correct.
In fact, the number of children who watched TV for 10 or more hour in a week is 4 + 2 = 6.

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Question 7
30 children were asked about the number of hours they watched TV programs last week. The results are recorded as under:

$\begin{matrix} Number of hours & 0 - 5 & 5 - 10 & 10 - 15 & 15 - 20 Frequency & 8 & 16 & 4 & 2 \end{matrix}$

Can we say that the number of children who watched TV for 10 or more hour in a week is 22? Justify your answer.

Q. Question 7
30 children were asked about the number of hours they watched TV programs last week. The results are recorded as under:

\begin{matrix} N u m b e r o f h o u r s & 0 - 5 & 5 - 10 & 10 - 15 & 15 - 20 F r e q u e n c y & 8 & 16 & 4 & 2 \end{matrix}

Can we say that the number of children who watched TV for 10 or more hour in a week is 22? Justify your answer.

Q. 30 children were asked about the number of hours they watched TV programmes last week. The results are recorded as under :

Number of hours	$0 - 5$	$5 - 10$	$10 - 15$	$15 - 20$
frequncy	$8$	$16$	$4$	$2$

What is the number of children who watched TV for 10 or more hours a week?

Q. 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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Question 7 30 children were asked about the number of hours they watched TV programs last week. The results are recorded as under: Number of hours0−55−1010−1515−20Frequency81642 Can we say that the number of children who watched TV for 10 or more hour in a week is 22? Justify your answer.

No, it is not correct. In fact, the number of children who watched TV for 10 or more hour in a week is 4 + 2 = 6.

No, it is not correct.
In fact, the number of children who watched TV for 10 or more hour in a week is 4 + 2 = 6.