Data was collected for 296 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 histogram below. Frequency 80 60 40 -20 60 65 70 75 80 85 Number of People in 10 min What is the class width for this histogram (and corresponding GFDT)? Note: Each class contains its lower class limit, but not its upper class limit. Class width =

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