Data was collected for 277 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 Guests Frequency 80-89 43 90-99 74 100-109 84 110-119 58 120-129 18 What is the class width? Class width = Hint: Remember the class width is NOT the difference bewteen the lower and upper class limits.