Question

Frequency Distribution: Plot a frequency polygon

1.5 to 4.5    3

4.5 to 7.5    5

7.5 to 10.5    9

10.5 to 13.5 5

13.5 to 16.5 3

Answer 1

We prepare a frequency polygon by preparing a frequency distribution first.

class	class mark	frequency
1.5-4.5	3	3
4.5-7.5	6	5
7.5-10.5	9	9
10.5-13.5	12	5
13.5-16.5	15	3

We make the frequency polygon with MInitab software, as given below :