Question

data was collected for 283 randomly selected 10 - minute intervals. for each ten - minute interval, the number of people entering the atrium of a large mall were recorded. the data is summarized in the table below.

number of guests	frequency
160 - 179	36
180 - 199	65
200 - 219	80
220 - 239	44

what is the class width for this frequency distribution table?
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 140 - 159.

Step3: Calculate class width

Upper - class limit = 159, Lower - class limit = 140. So, class width = 159 - 140 = 19.

Answer:

19