Question 8 i 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 - 48810 -3 -4 - -2 -2 -8 -15 -1 -17 -6113 -2 -8 -5 - - -6 -8 -7 - 14 - 12end matrixi Make a grouped frequency distribution table for this data- taking class width 5 and one of the class intervals as 5- 10 -

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Standard VIII

Mathematics

Frequency Table of Grouped Data (Exclusive Form)

Question 8 i ...

Question

Question 8 (i)
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.

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Solution

(i) Our class intervals will be 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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Question 8 (i)
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.

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. 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?

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(i) Our class intervals will be 0−5, 5− 10,10 −15….. The grouped frequency distribution table can be constructed as follows. HoursNumber of children0−5105−101310−15515−202Total30

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