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5. If P(x)= x/6, what are the 2 points possible values of x for it to be 11. Is P(X) construct a a probability distribution?* 2 points probability distribution? * A. 0,2,3 P(x)= x/x+2 for x= 0,1,2 O B. 1,2,3 O C. 2,3,4 O A. yes O D. 1, 1,2 B. no O C. maybe D. Uncertain 1. Which of the following is a 2 points 6.x 2 points discrete random variable? * For numbers 6-8, refer to the probability distribution shown below. 12. Find the mean of the 2 points (x 1/8 3/8 A. the average amount of electricity probability distribution. O can of the probability distribution? consumed A. 1.5 O B. the number of patients in a hospital B. 1.2 A. 12.42 C. the amount of paint used in O C. 1.6 B. 12.43 repainting a building O D. 1.8 C. 12.44 O D. the average weight of female D. 12.45 athletes 7. What is the variance of the 2 points probability distribution? * A. 0.75 13. Find the variance of the 2 point 2. If two coins are tossed, 2 points B. 1.00 probability distribution. * which is not a possible value of O C. 1.25 the random variable for the number of heads?* D. 0.50 A. 47.93 O A. O B. 47.94 O B. 1 8. What is the standard 2 points O C. 47.95 deviation of the probability distribution? O D. 47.96 A. 1.00 3. Which of the following is not 2 points a true statement? * B. 0.87 14. Find the mean of the 2 points O C. 1.12 probability distribution.* O A. the value of a random variable could be zero O D. 0.71 PM 1/10 3/10 1/10 2/20 3/10 O B. random variables can only have one value. O A. 3. 1 O C. the probability of the value of a B. 3.2 random variable could be zero 2 points O C. 3.3 D. the sum of all the probabilities in O For numbers 9-10, refer to the probability distribution shown below. a probability distribution is always P ( X ) 1/5 1/5 1/5 115 1/5 O D. 3.4 equal to one. 9. What is the mean of the probability distribution? A. 1.5 2 points B. 2.0 O C. 3.5 A. P(X) = 1/X O D. 4.0 15. Find the variance of the 2 points B. P(X) = X/6 probability distribution. * C. P(X) = 6/X D. P(X) = 1/6 10. What is the variance of the 2 points PM) 1/10 3/10 1/10 2/10 3/20 probability distribution? * A. 1.98 A. 4.15 B. 6.35 B. 1.99 O C. 8.00 O C. 2.00 D. 7.50 D. 2.01