Suppose that Jeff and Douglas are college roommates. Both chose to do their laundry at the dormitory laundry facility on Tuesday evening. Since Jeff had to study for a biology examination, he asked Doug to pick up his laundry as a favor for him when it was done, and Doug agree to do so. In this case, Doug is .

Match the item to the definition: indirect correlation, correlational research, correlational research, covary, pearson correlation coefficient, pearson correlation coefficient, direct correlation a. used to describe the relationship between two or more naturally occurring variables b. determines whether scores on the two variables covary c. whether two variables vary or change together d. denoted by the symbol "r" e. provides information about the sign (direction) and magnitude(strength) of the linear relationship. f. when the correlation is positiveg. when the correlation is negative