4.10 The ministry of Health and Long-Term Care in Ontario, Canada, publishes information on its web site (www.health.gov.on.ca) on the time that patients must wait for various medical procedures. For two cardiac procedures completed in fall of 2005, the following information was provided:
Number of Completed Procedures Median Wait Time (days)
Mean Wait Time (days)
90%
Completed Within (days)
Angioplasty 847 14 18 39 Bypass surgery 539 13 19 42 The median wait time for angioplasty is greater than the median wait time for bypass surgery but the mean wait time is shorter for angioplasty than for bypass surgery. What does this suggest about the distribution of wait times for these two procedures?