Q-2
(a) Military radar and missile detection systems are designed to warn a country of an enemy attack. A reliability question is whether a detection system will be able to identify an attack and issue a warning. Assume that a particular detection system has a 0.90 probability of detecting a missile attack. Use the binomial probability distribution to answer the following questions.
a) If two detection systems are installed in the same area and operate independently, what is the probability that at least one of the systems will detect the attack?
b) If three systems are installed, what is the probability that at least one of the systems will detect the attack?
Q-3
(b) In an article about the cost of health care, Money magazine reported that a visit to a hospital emergency room for something as simple as a sore throat has a mean cost of $328 (Money, January 2009). Assume that the cost for this type of hospital emergency room visit is normally distributed
d) $p - value = 1 - \alpha$
