20. The following sample observations were randomly selected: X: 5 3 6 3 4 468 Y: 13 15 7 12 13 11 9 5 Determine the correlation coefficient and the coefficient of determination. Interpret. 21. Bi-lo Appliance Super Store has outlets in several large Canadian cities. The general sales manager plans to air a commercial for a digital camera on selected TV stations prior to a sale starting on Saturday and ending Sunday. She plans to get the information for the Saturday–Sunday digital camera sales at the various outlets and pair them with the number of times the advertisement was shown on the local TV stations. The purpose is to find whether there is any relationship between the number of times the advertisement was aired and digital camera sales. The pairings are as follows: Location of TV Station Number of Airings Sales ($ thousands) Calgary 4 $15 Edmonton 2 8 Quebec City 5 21 Halifax 6 24 St John’s 3 17

a. Determine the correlation coefficient.

b. Determine the coefficient of determination.

c. Interpret these statistical measures.