A Company's Chief Operating Officer (COO) Keeps Track of the Mileage

Multiple Choice

A company's Chief Operating Officer (COO) keeps track of the mileage on her trips from her office at corporate headquarters to the company's off-site manufacturing facility and its nearby suppliers. The stem-and-leaf display of the data for one year is below. In developing a histogram of these data, how many classes would be used?

A) 4
B) 5
C) 6
D) 7
E) 8