A statistics student is studying if there is a relationship Using the computer output, what is the correlation? between the price of a used car and the number of
miles it had been driven. She collects data for 20 cars
0-0.82
of the same model with different mileage and
-0.68
determines each car's price using a used car website. 0.68
The analysis is given in the computer output.
0.82
Predictor Coef SE Coeft-ratio
Constant 24157.2 2164.1 2.965 0.046
Mileage
-0.181 0.024 5.377 0.000
S = 3860.7 R-Sq = 68.0% R-Sq (Adi) = 67.5%