Question

For a grouped frequency distribution table the classes are:

(100 - 109) (110 - 119) (120 - 129) (130 - 139 ) (140 - 149).

Find the class size.

• A. 9
• B. 10
• C. 11
• D. 12

Answer 1

The correct option is B 10

From the class interval, we can find that these are from an inclusive type of grouped frequency distribution table. We know that the number of scores in the class interval says (110 - 119), including 110 and 119, is called the class size or width of the class. In this example, the class size is 10.