Question

The classes are 10-20,20-30,30-40....what is the class interval of each class?

Answer 1

CI

10-20

20-30

30-40

40-50, etc.

h=upper limit- lower limit = 20-10 = 10

Answer 2

Class intervals are
10-20
20-30
30-40
40-50
and so on
therefor class size(h)=difference between upper class limit and lower class limit
=20-10=10
there for class size(h)=10