Question

Prepare a frequency polygon from the following data :

C.l	0-6	6-12	12-18	18-24	24-30	30-36
f	4	8	15	20	12	2

Answer 1

To get polygon plot the points against micl points against the class frequencies then join the plotted points by a straight, extend the end points to reach the x-axis at a distance of half a class interval.