1. Which of the following is an example of a discrete variable? A. Measuring distance B. The amount of time needed to solve a problem C. Measuring volume of beer in a distillery D. The race of each student in a psychology class 2. What is the value of (EX)^2 for the scores 2, 1, 3? A. 9 B. 63 C. 36 D. 6 3. What is the total number of scores for the distribution shown in the following table? X f 4 6 3 4 2 9 1 3 A. 10 B. 22 C. 32 D. 27