Jean just returned from active duty in a war zone. He has been experiencing hyperarousal and reexperiencing the traumatic events he encountered. Which substance is he most likely to turn to first?

Which of the following is NOT a reason to develop a friendship?

a) companionship b) competition c) social approval d) occasional helping hand at relatively little cost

The value in a distribution such that an equal number of scores are above it and below it

is called the . a. mean b. median c. mode d. correlation coefficient