Question: Data was collected for 328 randomly selected 10 minute intervals. For each ten-minute interval, the number of people entering the atrium of a large mall

Data was collected for 328 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 Frequency

Guests

40-59 69

60-79 82

80-99 41

100-119 55

120-139 81

What is the class width for this GFDT?

Class width =

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