Single adults comprise ____% of the population in the United States.

Two variables are said to be correlated when scores on one variable

A) are unrelated to the scores on the second variable. B) are related to the scores on the second variable. C) cause the scores on the second variable. D) are different from the scores on the second variable.

There is a negative correlation between wearing one's seat belt and the severity of injuries received during an accident. Which statement correctly illustrates this correlation?

A) The more often you wear your seat belt, the more serious the injury you are likely to receive in an accident. B) The more often you wear your seat belt, the less likely you are to suffer serious injuries in an accident. C) Wearing your seatbelt prevents you from being injured in an accident. D) Failing to wear your seat belt increases the likelihood that you will sustain serious injuries in an accident.