Question

Sort the following class interval in increasing order of their class interval width.

• A. 9-13
• B. 15-22
• C. 4-7
• D. 5-18

Answer 1

Class interval width
= Upper limit - lower limit
So for interval 9-13
Class interval width= 13 - 9 = 4
for interval 15-22
Class interval width= 22 - 15 = 7
for interval 4-7
Class interval width= 7 - 4 = 3
for interval 5-18
Class interval width= 18 - 5 = 13
13>7>4>3
So arranging them in increasing order we get
4-7, 9-13, 15-22, 5-18