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6 A marketing group found that p 40 of adult cell phone owners have downloaded...

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6 A marketing group found that p 40 of adult cell phone owners have downloaded an application app to their cell phone Assume this percentage applies to the population of all adult cell phone owners a In a random sample of 50 adult cell phone owners how likely is it to find that more than 60 have downloaded an app to their cell phone b Refer to part a Suppose you observe a sample proportion of 0 62 Generate a 90 confidence interval about the true proportion p of adult cell phone owners who have downloaded an app c Do you think the marketing group assessment is valid Please circle your answer YES NO Why Please brief explanation

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