Air Canada is preparing to launch a new airline specializing in servicing international flights, and is conducting a survey to collect data on the reasons for travel and the types of flights taken by its current customers. The survey was randomly given to individuals who had booked a flight for travel within the next month.

	International	Domestic	Total
Leisure Purposes	250	450	700
Business Purposes	550	300	850
Total	800	750	1550

Part i A traveller is selected at random. What is the probability that he is travelling for business reasons given that his destination is outside of Canada?

A. 550/800
B. 550/850
C. 550/1550
D. 850/1550

Part ii Which of the following statements is true?

A. Reasons for travel and destination are dependent, but they would be independent if we changed the second row of counts from 550, 300, 850 to 550, 1540, 2090.
B. Reasons for travel and destination are dependent, but they would be independent if we changed the second row of counts from 550, 300, 850 to 550, 1110, 1660.
C. Reasons for travel and destination are independent.
D. Reasons for travel and destination are dependent, but they would be independent if we changed the second row of counts from 550, 300, 850 to 250, 600, 850.
E. Reasons for travel and destination are dependent, but they would be independent if we changed the second row of counts from 550, 300, 850 to 550, 990, 1540.
F. Reasons for travel and destination are dependent, but they would be independent if we changed the second row of counts from 550, 300, 850 to 550, 550, 1100.

Part iii In order to attract potential customers to its new airline, Air Canada is giving discounts to individuals that are flying to international destinations during its first month of service. The 800 individuals who were travelling outside of Canada were invited to participate in the following experiment. Half of the individuals travelling for business related reasons are randomized to receive the discounted air fare and half do not receive a discount. The individuals travelling for leisure purposes are randomized in a similar fashion. After six months, the proportion of business travellers who continue to fly with Air Canada's new airline is compared between the discounted airfare group and the regular airfare group. The same comparison is also done among the leisure travellers.

In the experiment described above, reasons for travel (leisure versus business) [CHECK ALL THAT APPLY]
A. is the response variable.
B. is the blocking variable.
C. defines the experimental units.
D. defines the treatments.
E. none of the above.

Part iv What is the purpose of performing the treatment randomization and comparison for the leisure and business travellers separately? Choose the most appropriate answer.

A. To evaluate the effect of reasons for travel on the travellers' willingness to taking international flights.
B. To ensure that both leisure and business travellers can participate in the study.
C. To control for the effect of reason for travel on the travellers' willingness to switch to the new airline.

Part v To display the data for the two variables: reasons for travel and whether travellers switch to taking the new airline after six months, what is the most appropriate display to use?

A. A histogram.
B. A stem-and-leaf display.
C. Side-by-side boxplots.
D. A scatterplot.
E. A contingency table.