Many Wal-Mart Stores Have Automotive Departments Where Customers Can Buy

Multiple Choice

Many Wal-Mart stores have automotive departments where customers can buy tires,have their vehicles serviced,and obtain other automotive services.Recently,the manager at an Ohio Wal-Mart collected data on the time customers had to wait to get the desired automotive service.Of the 500 cars in the sample,the shortest time any customer spent waiting was 3 minutes and the longest time was 183 minutes.Assuming that the manager wishes to develop a frequency distribution with 9 classes,which of the following would be an appropriate class width for each class?

A) 10.50
B) 19.99
C) 20.00
D) 3 to 23