AC Nielson Company provides information to organizations advertising on television. Prior research indicates that adult Americans watch an average of 6.0 hours of television per day with a standard deviation of 1.5 hours.
a. What is the probability that a randomly selected adult American watches 5 or more hours of television per day?
b. What is the probability that a randomly selected adult American watches between 7 and 8 hours (inclusive) of television per day?
c. For how many hours per day mist an adult American watch television in order to be in the top 5% of all the Adult American television watchers?
d. In a sample of 25 randomly selected adult Americans what is the probability that the average time for watching television per day will be equal to or exceeds 6.5 hours?