What is a positive correlation? A negative one?
What will be an ideal response?
Answer: A positive correlation is a relationship in which as one variable goes either up or down, the other variable goes in the same direction. A negative correlation is a relationship in which as one variable goes either up or down, the other variable goes in the opposite direction.
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Which of the following persons is most likely to maintain good intellectual functioning into old age?
a. Sarah, of average intelligence, who does the crossword puzzle every day and takes a brisk one-hour walk each morning b. Jim, who has a high IQ and reads regularly, but rarely exercises c. Paul, who has a high IQ, runs three miles each day, and plays handball regularly, but doesn't read even the daily paper d. We do not have enough information to make a prediction.
Miranda suffers from type 2 diabetes. If she is typical, you would guess that she is also:
a. a smoker b. a moderate to heavy drinker (of alcohol) c. obese d. under the age of 50