5.49 What is the meaning of the expected value of a probability distribution? 5.50 What are the four

5.49 What is the meaning of the expected value of a probability distribution? 5.50 What are the four properties that must be present in order to use the binomial distribution? 5.51 What are the four properties that must be present in order to use the Poisson distribution? 5.52 When do you use the hypergeometric distribution instead of the binomial distribution?