Question

a mid- point of class interval is called as__________​

Answer 1

Answer:

The mid-point of class interval is known as class-mark.

Answer 2

A mid-point of the class interval is called a classmark.

Step-by-step explanation:

• A classmark is the midpoint of a class interval.
• This value of classmark is used to calculate the mean, for drawing line graphs and to find the average.
• In words, a classmark is the average of the upper limit of a class and the lower limit of a class in a distribution.
• The formula for classmark is given as-

Classmark= upper limit of class+ lower limit of class/2

For example, let's calculate the classmark for the class 20-30

the upper limit of class=20, the lower limit of class=30

Classmark= 30+20/2

                 =15

Hence, a classmark is the midpoint of the class intervals.