There is a 0.0724 probbability that a best-of-seven contest will last four games, a 0.2115 probability that it will last five games, a 0.2747 probabilty that it will last six games, and a 0.4414 probability that it will last seven games. Verify that this is a probability distribution. Find its mean and standard deviation. Is it unusual for a team to "sweep" by winning in four games?
What is the mean of the probability distribution?
What is the standard deviation of the probability distribution?
Is it unusual for a team to win in four games?