1. According to historical information, 77% of husband-wife families with kids under 18 years old have life insurance. A random sample of six husbands-wife families was selected. What is the probability that exactly four families have life insurance?
2. According to the Insurance Data Bank, 14% of U.S. drivers are uninsured. A random sample of seven drivers was selected. What is the standard deviation of this distribution?
3. According to the Insurance Data Bank, 14% of U.S. drivers are uninsured. A random sample of seven drivers was selected. What is the standard deviation of this distribution?
4. A company that bakes chocolate chips cookies averages 5.2 chocolate chips per cookie. Assume that the chocolate chips per cookie follows the Poisson distribution. What is the probability that a randomly selected cookie will contain exactly four chocolate chips?
5. A company that bakes chocolate chips cookies averages 5.2 chocolate chips per cookie. Assume that the chocolate chips per cookie follows the Poisson distribution. What is the probability that a randomly selected cookie will contain one or two chocolate chips?
6. Assume that the number of customers who arrive at a water ice stand follows the Poisson distribution with an average rate of 6.4 per 30 minutes. What is the probability that three of four customers will arrive during the next 30 minutes?