The Ministry of Health and Long-Term Care in Ontario, Canada, publishes information on the time that patients must wait for various medical procedures on its web site (www.health.gov.on.ca). For two cardiac procedures completed in fall of 2005, the following information was provided:

a. Which of the following must be true for the lower quartile of the data set consisting of the 847 wait times for angioplasty? i. The lower quartile is less than 14. ii. The lower quartile is between 14 and 18. iii. The lower quartile is between 14 and 39. iv. The lower quartile is greater than 39.
b. Which of the following must be true for the upper quartile of the data set consisting of the 539 wait times for bypass surgery? i. The upper quartile is less than 13. ii. The upper quartile is between 13 and 19. iii. The upper quartile is between 13 and 42. iv. The upper quartile is greater than 42.
c. Which of the following must be true for the number of days for which only 5% of the bypass surgery wait times would be longer? i. It is less than 13. ii. It is between 13 and 19. iii. It is between 13 and 42. iv. It is greater than 42.

Transcribed Image Text:

Number 90% of Com-Median Mean Com pleted ait Wait pleted Proce- dures (days (days) (days) Time Time Within Procedure 847 Angioplasty Bypass surgery 539 39 42 14 18 19