Question

ly 80% of adult who own a computer claim to have a firewall that In a press release installed on their computer to prevent 400 computers, only about 40% actually had a firewall installed. (a) Suppose that the true proportion of computer owners hackers from stealing personal information. This estimate was based on a survey of 3000 people. It was also reported that in a study of who have a firewall installed is 0.80. If 20 computer owners are selected at random, what is the probablity that more than 14 have a firewall installed? (Round your answer to five decimal places.) (o) Suppose that the true proportion of computer owners who have a firewall installed is 0.40. If 20 computer owners are selected at random, what is the probability that more than 14 have a firewall installed? (Round your answer to five decimal places.) (c) Suppose that a random sample of 20 computer owners is selected and that 15 have a firewall installed. What is the probability of this outcome if the true proportion of computer owners who have a firewall installed is 0.40? (Round your answer to five decimal places.) What is the probability of this outcome if the true proportion of computer owners who have a firewall installed is 0.80? (Round your answer to five decimal places.)

Answer 1