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Data was collected for 345 randomly selected 10 minute intervals. For each ten-minute interval, the number of people entering the atrium of a large mall

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Data was collected for 345 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 Frequency of Guests 120 - 129 16 130 - 139 79 140 - 149 88 150 - 159 93 160 - 169 69 What is the class width for this frequency distribution? Class width

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