Which of the following pairs of variables would be the most likely to have a correlation close to r = 0.5?
(A) X = flight distance in kilometres; Y = flight distance in miles
(B) X = price of orange juice; Y = amount of orange juice sold
(C) X = number of incorrect answers on the midterm test; Y = score on the test
(D) X = IQ; Y = weight
(E) X = height; Y = shoe size
