An article summarized results from a national survey of 2302 americans age 8 to 18. the sample was selected in a way that was expected to result in a sample representative of americans in this age group. (a) of those surveyed, 1221 reported owning a cell phone. use this information to construct a 90% confidence interval estimate of the proportion of all americans age 8 to 18 who own a cell phone. (round your answers to three decimal places.) (b) of those surveyed, 1529 reported owning an mp3 music player. use this information to construct a 90% confidence interval estimate of the proportion of all americans age 8 to 18 who own an mp3 music player.

an article included the following statement: "few people believe there's much reality in reality tv: a total of 76% said the shows are either 'totally made up' or 'mostly distorted.'" this statement was based on a survey of 1005 randomly selected adults. compute a bound on the error (based on 95% confidence) of estimation for the reported proportion of 0.76. (round your answer to three decimal places.)interpret the bound.