A hospital is trying to reduce the number of elective surgeries added to its schedule at the last minute. The hospital adds new rules regarding these “add-on” surgeries. The data in Table 9.24 show...

A hospital is trying to reduce the number of elective surgeries added to its schedule at the last minute. The hospital adds new rules regarding these “add-on” surgeries. The data in Table 9.24 show the number of add-on surgeries in a sample of days prior to and after the implementation of the rules.