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Data was collected for 292 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 292 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.

140-149	47
150-159	98
160-169	56
170-179	26
180-189	65

What is the class width for this GFDT? Class width =

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