Question

8
Constract frequency polygon of the following frequency distributions
Class
10-20
20-30
30-40
40-50
50-60
Frequency
3
5
8
4
2​

Answer 1

Answer:

Mark the class intervals along the X-axis and the number of students along the Y-axis. Draw a histogram for the given data. Now mark the mid points of the upper sides of the consecutive rectangles. The mid points are joined with the help of a ruler. Note that, the first and last edges of the frequency polygon meet at the mid point of the vertical edges of the first and last rectangles.