In a frequency distribution,

**class width**refers to the difference between the upper and lower boundaries of any class or category. It is calculated as:Class width = (max – min) / n

where:

*max*is the maximum value in a dataset*min*is the minimum value in a dataset*n*is the number of classes

To calculate class width, simply fill in the values below and then click the “Calculate” button.

Class Width: **3.5556**

**Explanation:**

Class Width = (max – min) / n

Class Width = (36 – 4 / 9 = **3.5556**