Suppose that administrators at a large urban high school want to gain a better understanding of the prevalence of bullying within their school. they select a random sample of 200 students who are asked to complete a survey anonymously. of these students, 63 report that they have experienced bullying. use this information to find a 90% ‑confidence interval for , the true proportion of students at this school who have experienced bullying. give the limits (bounds) of the confidence interval as a proportion, precise to three decimal places. lower limit = upper limit =

An oil exploration company currently has two active projects, one in asia and the other in europe. let a be the event that the asian project is successful and b be the event that the european project is successful. suppose that a and b are independent events with p(a) = 0.2 and p(b) = 0.8. (a) if the asian project is not successful, what is the probability that the european project is also not successful? (b) what is the probability that at least one of the two projects will be successful? (c) given that at least one of the two projects is successful, what is the probability that only the asian project is successful? (round your answer to three decimal places.)