Inspection of a random sample of 28 american airlines md80, Ask an Expert

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Inspection of a random sample of 28 American Airlines MD?80 aircraft showed that 17 needed repairs to fix a wiring problem that might compromise safety. (a) How large a sample would be needed to estimate the true proportion of jets with the wiring problem, with 95 percent confidence and an error of ± 8 percent? (Round your answer to the nearest whole number.)

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