Question

Data was collected for 316 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
180 – 189 47
190 – 199 96
200 – 209 62
210 – 219 24
220 – 229 87


What is the class width for this frequency distribution?

Class width =

Answer 1

Based on the data given in the table about the number of guests in every 10 minute intervals, the class width can be found to be 9.

What is this frequency distribution's class width?

The class width in a frequency distribution refers to the interval or range between the classes.

The class in this case is the number of guests.

To find the class width, take the difference between the largest and smallest digits in any class.

The class width is therefore:
= 189 - 180

= 9 guests

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