Question

In a frequency distribution with classes 0 –10, 10 –20 etc., the size of the class intervals is 10. The lower limit of fourth class is

(a) 40 (b) 50 (c) 20 (d) 30

Answer 1

(d) 30

The lower value of the class interval is called its Lower Class Limit.

First class = 0 -10

Second class = 10 – 20

Third class = 20 – 30

Fourth class = 30 – 40

Fifth class = 40 – 50

and Tenth class = 90 – 100