Construct a histogram and then a frequency polygon for the follow… - Vidyadip

Question

Construct a histogram and then a frequency polygon for the following frequency distribution.

Class Interval	100-150	150-200	200-250	250-300	300-350
Frequency	10	15	17	12	10

✓

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. Draw rectangles of histogram as per given data .
4. For each rectangle, mark the midpoint of its length at the top part. In this case, points are $(125.10),(175,15),(225,17),(275,12),(325,10)$.
5. Mark two more midpoints of Zero frequency on $x$-axis at the start and at th end.
6. Now connect the points using straight lines.

Class Interval	Frequency
100-150	10
150-200	15
200-250	17
250-300	12
300-350	10

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