1. An appliance store has outlets in several cities in Punjab. The general sales manager plans to air a commercial for a digital camera on selected local TV stations prior to a sale starting on Saturday and ending Sunday. She plans to get information for Saturday-Sunday camera sales at various outlets and pair them with number of times the advertisement was shown on the local TV stations. The purpose is to find whether there is any relationship between number of times the advertisement was aired and the camera sales.

Location of

TV station

Number of Airings

Saturday-Sunday Sales

(Rs. thousands)

Lahore

8

35

Faisalabad

2

8

Multan

5

21

Rawalpindi

6

24

Sialkot

3

17

1. What is the dependent variable?
2. Determine the coefficient of correlation.
3. Determine the least squares regression line?