Problem Statement
The question gives us a table of classes and their corresponding frequencies and we are asked to find the range of the classes in the table.
Method
To solve the question, we need to know what the Range is.
The Range is the difference between the upper boundary of the highest class and the lower boundary of the lowest class.
Also, the Range is also defined as the difference between the midpoint of the highest class and the midpoint of the lowest class.
With these two descriptions, we have two methods for finding the Range of the values in the Table.