Use an example (hypothetical or real) in your answer.

B₁ is an estimator of B₁ a. True O b. False

For each problem, select the best response. (a) In a scatterplot of the average price of a barrel of oil and the average retail price of a gallon of gasoline, you expect to see A. a positive association. B. very little association. C. a negative association. D. None of the above. (b) What are all the values that a correlation r can possibly take? A. -1 ≤ ≤ r ≤ ≤ 1 B. r ≥ ≥ 0 C. 0 ≤ ≤ r ≤ ≤ 1 D. None of the above. (c) You have data for many years on the average price of a barrel of oil and the average retail price of a gallon of unleaded regular gasoline. When you make a scatterplot, the explanatory variable on the x -axis A. is the price of oil. B. is the price of gasoline. C. can be either oil price or gasoline price. D. None of the above

Which of the following statements about geometric mean return is are true: I. Geometric mean return is always less than or equal to arithmetic mean return II. Geometric mean return is used only for grouped data. III. Geometric mean return cannot be a negative number. a. I only d. III only b. I & II c. I & III d. III only