ECON 15A Homework 5 1. The random variable x has the following probability distribution: X 1 3 5 7 p(x) .1 .2 .4 .2 a) List the values xcan assume. b) What value of x is most probable? c) Display the probability distribution as a graph. d) Find P(x = 7). e) Find P(x > 5). f) Find P(x > 2). g) Find E (x). 2. Consider the following probability distribution: X -4 -3 -2 -1 0 1 2 P(x) 0.02 0.07 0.10 0.15 0.30 0.18 0.10 a) Calculate u, oz, and o. b) Graph p(x). Locate , u - 20, and a + 20 on the graph. c) What is the probability the x is in the interval , + 20