Choose the letter of the best answer. Write the chosen letter on a separate sheet of paper. 1. It is the central or average of its corresponding probability mass function. A. mean C. standard deviation B. variance D. probability 2. Determine the Mean or Expected Value of random variable below. Tile Number of times picked 1 2 E 2 4 15 3 8 15 4 1 15 A. 2.53 C. 2.55 B. 2.54 D. 2.56 3. What is the mean outcome if a pair of die is rolled once? A. 1.5 C. 3.5 B. 2.5 D. 4.5 4. Find the mean of the probability distribution involving the random variable X that gives the number of heads that appear after tossing four coins once. A.4 C.2 B.3 D.1 5. The probabilities that a printer produces 0,1,2, and 3 misprints are 42%, 28%, 18%, and 12% respectively. What is the mean value of the random variable? A. 1 C. 3 B. 2 D. 4 6. The random variable X, representing the number of nuts in a chocolate bar has the following probability distribution. What is the mean? Y 0 1 2 3 4 PM i i i i i 10 10 10 10 10 A. 1.5 C. 1.7 B. 1.3 D. 1.9 7. These are two values that describe how scattered or spread out the scores are from the mean value of the random variable. A. variance and standard deviation B. mean and probability distribution C. probability and statistics D. mean and variance For numbers 8 and 9. Complete the table below using mean {11] = 5. Write the answer in your answer sheets. Probability Distribution Table of Random Variable X X 2 4 6 8 P{x] 0.25 0.25 0.25 0.25 {x-p] ? ? ? ? {Jr-p]2 ? '9 ? ? 10. Compute for the variance and stande deviation of the Probability Distribution table of the Random Variable X. A. Variance = 5; Standard Deviation = 2.24 B. Variance = 4; Standard Deviation = 3.24 C. Variance = 3; Standard Deviation = 4.24 D. Variance = 2; Standard Deviation = 5.24