91Ó°ÊÓ

The points on a scatterplot lie very close to a straight line. The correlation between \(x\) and \(y\) is close to (a) \(-1 .\) (b) \(1 .\) (c) either \(-1\) or 1 , we can't say which.

Sloppy writing about correlation. Each of the following statements contains a blunder. Explain in each case what is wrong. (a) "There is a high correlation between the sex of American workers and their income." (b) "We found a high correlation \((r=1.09)\) between students' ratings of faculty teaching and ratings made by other faculty members." (c) "The correlation between height and weight of the subjects was \(r=0.63\) centimeter per kilogram."