Question 5 An article in The Engineer ("Redesign for Suspect Wiring." June 1990) reported the results of an investigation into wiring errors on commercial transport aircraft that may produce faulty...

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Extracted text: Question 5 An article in The Engineer ("Redesign for Suspect Wiring." June 1990) reported the results of an investigation into wiring errors on commercial transport aircraft that may produce faulty information to the flight crew. Such a wiring error may have been responsible for the crash of a British Midland Airways aircraft in January 1989 by causing the pilot to shut down the wrong engine. Of 1600 randomly selected aircraft, sixteen were found to have wiring errors that could display incorrect information to the flight crew. (a) Find a 90% confidence interval on the proportion of aircraft that have successful wirings. Blank 1