Data was collected for 278 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 tabl below. Number of Guests Frequency 80 - 89 98 90 - 99 47 100 109 27 110 119 34 120 129 72 What is the class width for this GFDT? Class width =