Construct a frequency polygon without using a histogram for the f… - Vidyadip

Question

Construct a frequency polygon without using a histogram for the following frequency distribution :

Class Mark	10	15	20	25	30	35	40
Frequency	4	20	40	45	30	25	5

✓

Answer

Steps:
1. On the $x$-axis, take $1 \mathrm{~cm}$ as 5 units and plot class interval.
2. On the $y$-axis, take $1 \mathrm{~cm}$ as 5 units and plot frequency.
3. Mark the given data on the graph. $(10,4),(15,20),(20,40),(25,45),(30,30),(35,25),(40,5)$
4. Mark two more midpoints of zero frequency on $x$-axis at the start and at the end.
5. Now connect the points using staright lines.

Class Mark	Frequency
10	4
15	20
20	40
25	45
30	30
35	25
40	5

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