Thirty children were asked about the number of hours they watched TV 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 12i 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-

#160;Number of hours #160;Frequency #160;0 510 #160;5 1013 #160;10 155 #160; #160;15 202 #160; #160;Total30 #160;(i) Above table(ii) Number ...

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Standard IX

Mathematics

Grouped Frequency Table

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:
$\begin{matrix} 1 & 6 & 2 & 3 & 5 & 12 & 5 & 8 & 4 & 8 10 & 3 & 4 & 12 & 2 & 8 & 15 & 1 & 17 & 6 3 & 2 & 8 & 5 & 9 & 6 & 8 & 7 & 14 & 12 \end{matrix}$

(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?

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Solution

Number of hours Frequency
0-5 10
5-10 13
10-15 5
15-20 2
Total 30
(i) Above table
(ii) Number of children who watched TV for $15$ hours or more $= 2$ children.

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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?

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]

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Number of hours	Frequency
0-5	10
5-10	13
10-15	5
15-20	2
Total	30

Number of hours Frequency 0-510 5-1013 10-155 15-202 Total30 (i) Above table(ii) Number of children who watched TV for 15 hours or more =2 children.

Number of hours Frequency
0-5 10
5-10 13
10-15 5
15-20 2
Total 30
(i) Above table
(ii) Number of children who watched TV for $15$ hours or more $= 2$ children.