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Ungrouped Frequency Table

From the give...

Question

From the given histogram find the cumulative frequency for class interval 20-30.

A

27

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B

42

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C

37

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D

12

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Solution

The correct option is A 27
$\begin{matrix} C l a s s I n t e r v a l & F r e q u e n c y & C . F . 0 - 10 & 6 & 6 10 - 20 & 9 & 15 20 - 30 & 12 & 27 30 - 40 & 10 & 37 40 - 50 & 5 & 42 \end{matrix}$

From the table it is observed that cumulative frequency for the class interval 30-40 is 27.

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Similar questions

From the given histogram find the cumulative frequency for class interval 20-30.

Q. In a histogram the area of each rectangle is proportional to

(a) the class mark of the corresponding class interval

(b) the class size of the corresponding class interval

(c) frequency of the corresponding class interval

(d) cumulative frequency of the corresponding class interval

If the cumulative frequency for the class interval (50-60) is 92, then find x

$\begin{matrix} Class Interval & 0 - 10 & 10 - 20 & 20 - 30 & 30 - 40 & 40 - 50 & 50 - 60 Frequency & 12 & 20 & x & 18 & 10 & 6 \end{matrix}$

Q. For the collection of numbers 12, 15, 8, 13, 12, 15, 9, 16, 24, 20, 20, 16 and 10, answer the following:

(i) What is the cumulative frequency of 16?

(ii) If 15 - 20 be an overlapping class interval when the numbers are grouped, find the cumulative frequency of the class interval.

(iii) If 15 - 20 be a nonoverlapping class interval when the numbers are grouped, find the cumulative frequency of the class interval.

Class intervals	Frequency
10-20	7
20-30	6
30-40	9

Greater than cumulative frequency of 1st group is.

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