Question

What is the formula to find the size of the class interval​

Answer 1

Answer:

it's not size it's range. just subtract the lower class limit from upper class limit

Answer 2

$\huge{\textbf{Answer:-}}$

Size of Class Interval = Range / Number of class

If you have 15 classes of income in the distribution of income example, work out 30 ÷ 15 = 2 .

Class intervals (lengths) should be equal. Intervals such as 0.15, 0.25, 0.55, 1.5, 2.5 and 5, 10, 20, 50, etc are desirable as your wish. For example, in the class 15 - 20, the starting point, 15, is divisible by the interval, 5.