Several dental offices were concerned with their 10% rate of no shows for appointments. The Canadian Dental Association recommended that to reduce these no shows, the receptionist should call each patient a day before his or her scheduled appointment, as a reminder and confirmation. A study was then made of 600 randomly selected appointments that were made under the new system. 42 no shows were recorded. Do the study results prove the new system reduces the percent or proportion of no shows?
Formulate and test the appropriate hypotheses at a 2% level of significance. Use the critics, value approach