Probability

5) What is the probability distribution for the number of tails? A. B. C. D. X P(X) X P(X) X P(X) P(X) 1/8 1/8 0 1/8 0 1/8 3/8 3 3/8 2 3/8 1 3/8 2 3/8 5 3/8 4 3/8 2 3/8 3 1/8 7 1/8 6 1/8 4 1/8 6) What is the mean of the probability distribution? A. 1.00 B. 1.50 C. 2.00 D. 2.50 For number 7-8. refer to the n obabilityD. 3 2) If P(X)=-, what are the possible values of X for it to be a probability distribution? A. 0,1,2 B. 0,2,3 C. 1,1,2 D. 1,2,3 3) A random variable X has the probability distribution below. What is the expected value or the mean? X P(X) X . P(X) 0.10 2 0.20 3 0.45 4 0.25 A. 2.58 B. 2.85 C. 5.28 D. 5.82 For number 4-6, refer to the problem below. Suppose three coins are tossed, Let X be the random variable representing the number of tails occur. 4) What are the possible values of the random variable X? A. 0,2,4,6 B. 1,3,5,7 C. 0,1,2,3 D. 0,1,2,4