Assume that an insurance survey is based on 1,000 randomly selected us households in the income class and that 640 these households bought life insurance last year. assuming that p equals .60 and the sample size is 1,000, what is the probability of observing a sample proportion that is at least .64?

Television viewing reached a new high when the global information and measurement company reported a mean daily viewing time of 8.35 hours per household. use a normal probability distribution with a standard deviation of 2.5 hours to answer the following questions about daily television viewing per household. a. what is the probability that a household views television between 4 and 10 hours a day? (to 4 decimals) b. how many hours of television viewing must a household have in order to be in the top 7% of all television viewing household? (to 2 decimals) c. what is the probability that a household views television more than 4 hours a day? (to 4 decimals)