Brad is taking medication for his depression. Unfortunately, he is experiencing some unpleasant side effects. He is experiencing dry mouth, forgetfulness and has gained twenty pounds. His medication is most likely to be __________

Eighteen overweight volunteers weighed themselves before and after a two-week diet. The appropriate design for testing the significance of the difference between the means is

a. related-samples t-test. b. independent-samples t-test. c. one-sample t-test. d. z-test.

What does the research indicate about the common phrase "Money can't buy you happiness?"

a. The phrase is false, at least in that having money means you don't have to worry about it. b. The phrase is false, money and happiness are unrelated. c. The phrase is true, having more money actually leads to lower levels of happiness. d. There is no research available on this topic.