Question

14) Find the class width for the
grouped frequency distribution
of the class intervals 1-20, 21-
40, 41-60, ..
*​

Answer 1

Firstly, we covert the inclusive series to exclusive series like 0.5-20.5, 20.5-40.5, . . .

So,

Class width = 20.5 - 0.5 = 20