3. An article2 reports data on X = distance between a cyclist and the roadway center line and Y = the separation distance between the cyclist and a passing car, from ten streets with bike lanes. The paired distances (Xi,Yi)

are determined by photography and are given below in feet.

(a) Compute SX,Y, S2 X, S2 Y, and rX,Y.

(b) Indicate how the quantities in part

(a) would change if the distances had been given in inches.

x 12.8 12.9 12.9 13.6 14.5 14.6 15.1 17.5 19.5 20.8 y 5.5 6.2 6.3 7.0 7.8 8.3 7.1 10.0 10.8 11.0