Question

It the classes are 0-5,5-10,10-15, 15-20,...
then in which class should the observation
15 be included ?​

Answer 1

Answer:

The first class interval is 0 – 5, ∴ The classes are: 0 – 5, 5 – 10, 10 – 15, 15 – 20, 20 – 25, 25 – 30, 30 – 35.