A positive correlation indicates that _______.
a. we can predict that two variables will change in the same direction
b. the variables move predictably in opposite directions
c. no consistent relationship exists between the two variables
d. one variable causes a change in the other variable
Question 2
Dr. Levin allowed members of his target population to volunteer to participate in his study. As a result, the findings of Dr. Levin's study were influenced by _______.
a. self-report bias
b. social desirability bias
c. sexual bias
d. self-selection bias