Question

Construct a cumulative frequency distribution table from the frequency table given below:

Class Interval	Frequency
1 - 10	12
11 - 20	18
21 - 30	23
31 - 40	15
41 - 50	10

Answer 1

The cumulative frequency distribution table is

C.I	c.f
1 - 10	12
11 - 20	30
21 - 30	53
31 - 40	68
41 - 50	78