Most regular brewed teas have about how much caffeine per cup?

Which of the following is the correct definition of "positive correlation"?

a. A measure of how strongly two variables are related to one another. b. An association between increases in one variable and decreases in another. c. An association between increases in one variable and increases in another—or between decreases in one and in another. d. A measure that shows that two variables have no relationship to each other.

To assess your personality, a phrenologist would want to

a. study your handwriting. b. study the lines on your palm. c. examine the shape of your skull. d. record your brain waves with an EEG.