Chapter 4.1, Problem 1E

After scoring a touchdown, a football team may elect to attempt a two-point conversion, by running or passing the ball into the end zone. If successful, the team scores two points. For a certain football team, the probability that this play is successful is 0.40.

1. a. Let X = 1 if successful, X = 0 if not. Find the mean and variance of X.
2. b. If the conversion is successful, the team scores 2 points; if not the team scores 0 points. Let Y be the number of points scored. Does Y have a Bernoulli distribution? If so, find the success probability. If not, explain why not.
3. c. Find the mean and variance of Y.