Independent variable : dependent variable :: maintaining condition : _____.

If the correlation between smoking and lung cancer is .50, smoking accounts for 50% of the variability in lung cancer

Indicate whether the statement is true or false

The single best predictor of aggression is:

A. gender. B. frustration. C. culture. D. anger. E. heat.

Angela is conducting a survey about popular fast foods. She is using several different 11-point rating scales for issues such as how good foods taste, how attractive they look, how good they smell, how healthy they are, and whether they are worth their price. Her best choice for methodology is a ____

a. group questionnaire b. phone interview c. focus group d. personal interview

Regarding the effects of coaching on standardized test scores, which of the following statements is most representative of current research?

A) Coaching can lead to 100-point gains if the quality of coaching is high. B) Coaching is not likely to lead to 100-point gains if student motivation is high. C) The best predictor of increased test scores could be "number of times tested" and not "coaching." D) The best predictor of increased test scores could be "coaching quality" and not "student motivation."