The following data represent the length (in months) of time it takes for a tumor to reoccur after chemotherapy. Use five classes to determine the class width.
19, 18, 17,, 21, 22, 54, 46, 25, 49
50,1, 59, 39, 43, 39, 5, 9, 38, 18
14, 45, 54, 59, 46, 50, 29, 12, 19, 36
38, 40, 43, 41, 10, 50, 41, 25, 19, 39
27, 20