For estimation concerning one proportion, use only method
Chapter 1, Problem 9.54(choose chapter or problem)
For estimation concerning one proportion, use only method 1 to obtain the condence intervals, unless instructed otherwise.A manufacturer of MP3 players conducts a set of comprehensive tests on the electrical functions of its product. All MP3 players must pass all tests prior to being sold. Of a random sample of 500 MP3 players, 15 failed one or more tests. Find a 90% condence interval for the proportion of MP3 players from the population that pass all tests.
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