Question

an airport measures the check-in waiting time for people on a certain flight. The times ( in minutes) for 14 passengers are given below. Determine the class width for a grouped data frequency table using 4 classes. 13,18,21,21,24,25,26,28,30,30,30,34,35,38

Answer 1

The formula for class width is

`class\text{ width=}(Maximumvalue−Minimumvalue)/(n)`

Where,

Minimum value = 13

Maximum value = 38

n = 4

`class\text{ width=}(38-13)/(4)=(25)/(4)=6.25`

Hence, the class width will be 7 since the next whole number after 6.25 is 7.