Question

how do we calculate class mark​

Answer 1

Answer:

Write the formula to find to the class-mark of a class interval.

Classmark: Classmark is defined as the mid-value of each class interval is called its class mark.

Formula. Class mark = (Upper limit + Lower limit ) / 2.

Class size: Class size is defined as the difference between the true upper limit and true lower limit of a class interval.

Formula.

Answer 2

Answer:

Formula:Upper limit+lower limit/2