When Dr. Pressley examines the study habits of his students he finds that as the number of hours they spend studying increases, so do their grades. He finds an even stronger correlation between partying and grades in that as their grades improve the number of hours they spend partying decreases. When he runs the statistics on these data he finds which of the following correlation coefficients for hours studying with grades and hours partying with grades respectively

Question

Quizplus · Accepted Answer

The positive correlation between hours studying and grades is represented by a positive coefficient (+0.34), indicating that as one variable increases, so does the other. The negative correlation between partying and grades is represented by a negative coefficient (-0.63), indicating that as one variable increases, the other decreases.

When Dr Pressley Examines the Study Habits of His Students He