Question

data was collected for 210 randomly selected 10 minute intervals. for each the number of people entering the atrium of a large mall were recorded. the data is in the frequency table below.

number of guests	frequency
80 - 99	29
100 - 119	55
120 - 139	31
140 - 159	39

what is the class width for this gfdt?
class width =

Explanation:

Step1: Identify class - width formula

Class width = Upper - class limit - Lower - class limit.

Step2: Select a class interval

Let's take the first class interval 60 - 79. Here, the lower - class limit is 60 and the upper - class limit is 79.

Step3: Calculate class width

Class width = 79 - 60=19.

Answer:

19