Thirty children were asked about the number of hours they watched TV programmes in the previous week- The results were found as follows- 186 - 28385 - 12 - 5 - 8 - 488 11083 - 4812 - 2 - 8 - 15 - 1 - 17 - 611382 - 8 - 5 - 9 - 6 - 8 - 7 - 14 - 12lend matrix Which of the following shows the correct frequency distributionA- beginarray - c - c - Wline Hours-Number of cchildrenlllhline 0-5 -5 11 hline 5-10-18111hline10-15-5111hline15-20-2111hline Total-30Nhline e n d array B- Nbegin array - c - c - hlineHours-Number of wchildrenllthline 0-5 - 13 Whline5-10-10111hline10-15-2111hline15-2085111hlineTotal-30Nlhlinelend array C- beginarray - c - c - Wline

The correct option is C [ Hours amp;Number of children; 0 5 amp;10; 5 10 ...

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Standard VIII

Mathematics

Interpreting Frequency Tables

Thirty childr...

Question

Thirty children were asked about the number of hours they watched TV programmes in the previous week. The results were found as follows:
$\begin{matrix} 1 & 6 & 2 & 3 & 5 & 12 & 5 & 8 & 4 & 8 10 & 3 & 4 & 12 & 2 & 8 & 15 & 1 & 17 & 6 3 & 2 & 8 & 5 & 9 & 6 & 8 & 7 & 14 & 12 \end{matrix}$
Which of the following shows the correct frequency distribution

$\begin{matrix} H o u r s & N u m b e r o f c h i l d r e n 0 - 5 & 13 5 - 10 & 10 10 - 15 & 2 15 - 20 & 5 T o t a l & 30 \end{matrix}$

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$\begin{matrix} H o u r s & N u m b e r o f c h i l d r e n 0 - 5 & 10 5 - 10 & 13 10 - 15 & 5 15 - 20 & 2 T o t a l & 30 \end{matrix}$

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$\begin{matrix} H o u r s & N u m b e r o f c h i l d r e n 0 - 5 & 10 5 - 10 & 8 10 - 15 & 5 15 - 20 & 7 T o t a l & 30 \end{matrix}$

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$\begin{matrix} H o u r s & N u m b e r o f c h i l d r e n 0 - 5 & 5 5 - 10 & 18 10 - 15 & 5 15 - 20 & 2 T o t a l & 30 \end{matrix}$

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Solution

The correct option is B
$\begin{matrix} H o u r s & N u m b e r o f c h i l d r e n 0 - 5 & 10 5 - 10 & 13 10 - 15 & 5 15 - 20 & 2 T o t a l & 30 \end{matrix}$

Taking the class intervals as 0−5, 5− 10,10 −15…..
The grouped frequency distribution table can be constructed as follows.
$\begin{matrix} H o u r s & N u m b e r o f c h i l d r e n 0 - 5 & 10 5 - 10 & 13 10 - 15 & 5 15 - 20 & 2 T o t a l & 30 \end{matrix}$

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Similar questions

Q. 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

(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?

Q. Question 8 (ii)
Thirty children were asked about the number of hours they watched TV programmes in the previous week. The results were found as follows:

\begin{matrix} 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 \end{matrix}

(ii) How many children watched television for 15 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.

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 follows:
$\begin{matrix} 1 & 6 & 2 & 3 & 5 & 12 & 5 & 8 & 4 & 8 10 & 3 & 4 & 12 & 2 & 8 & 15 & 1 & 17 & 6 3 & 2 & 8 & 5 & 9 & 6 & 8 & 7 & 14 & 12 \end{matrix}$
(i) Make a grouped frequency distribution table for this data, taking class width 5 and one of the class intervals as 5- 10. [2 MARKS]

Q. Question 8 (ii)
Thirty children were asked about the number of hours they watched TV programmes in the previous week. The results were found as follows:

\begin{matrix} 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 \end{matrix}

(ii) How many children watched television for 15 or more hours a week?

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Thirty children were asked about the number of hours they watched TV programmes in the previous week. The results were found as follows: 1623512584810341228151176328596871412 Which of the following shows the correct frequency distribution

The correct option is B HoursNumber of children0−5105−101310−15515−202Total30 Taking the class intervals as 0−5, 5− 10,10 −15….. The grouped frequency distribution table can be constructed as follows. HoursNumber of children0−5105−101310−15515−202Total30