Draw a histogram and then a frequency polygon for each of the following frequency distribution:(iii)

Class Interval
Frequency

Solution:-

Steps to draw histograms for given frequency distributions,

1. On the x – axis, take units and plot frequency.

2. On the y – axis, take units and plot class interval.

3. Draw rectangles of histograms according to the given frequency distribution.

4. Then, for each rectangle mark the midpoint of its length at the top.

5. So, in the graph midpoints are , , , , .

6. Also mark two more midpoints of zero frequency at the start and end on the x-axis.

7. Finally Connect the points using straight lines.