Sarah and Bob share a 1,000-minute cell phone calling plan.
(a) Make a stacked dot plot to compare the lengths of cell phone calls by Sarah and Bob during the last week.
(b) Describe what the dot plots tell you.
Sarah’s calls: 1, 1, 1, 1, 2, 3, 3, 3, 5, 5, 6, 6, 7, 8, 8, 12, 14, 14, 22, 23, 29, 33, 38, 45, 66
Bob’s calls: 5, 8, 9, 14, 17, 21, 23, 23, 24, 26, 27, 27, 28, 29, 31, 33, 35, 39, 41