4. If P(X) =, what are the possible values of X for it to be a probability distribution? A. 0, 2, 3 В. 1, 2, 3 C. 2, 3, 4 D. 1, 1, 2 For numbers 5-6, refer to the probability distribution shown below. 3 P(X) 1/8 3/8 3/8 1/8 E. What is the mean of the probability distribution? А. 1.2 С. 1.6 В. 1.5 D. 1.8 What is the variance of the probability distribution? С. 1.00 A. 0.50 В. 0.75 D. 1.25 Which of the following statements is NOT TRUE about variance? A. cannot be negative B. greater than 0 C. less than 0 a measure of snread for a distribution of a random variable

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