Im just trying to find the class width the book says its 9 but I get 7.83 or 8 if rounded width = (98-51)/6 = 7.83 Am I messing up somewhere?

6. Ages of the Vice Presidents at the Time of Their Death The ages at the time of death of those Vice Presidents of the United States who have passed away are listed below. Use the data to construct a frequency distribution. Use 6 classes. The data for this exercise will be used for Exercises 8, 10, and 12. 90 83 30 73 70 E 63 79 70 71 ?2 794 6? 54 81 66 62 63 68 5? 66 96 78 55 60 66 5? 7'1 60 85 T6 T! 88 T8 81 64 66 7? 93 70