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  1. #1
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    homework

    8.62 In 1992, the FAA conducted 86,991 pre-employment drug tests on job applicants who were to be engaged in safety and security-related jobs, and found that 1,143 were positive.

    (a) Construct a 95 percent confidence interval for the population proportion of positive drug tests.

    (b) Why is the normality assumption not a problem, despite the very small value of p? (Data are from Flying 120, no. 11 [November 1993], p. 31.)
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  2. #2
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    Quote Originally Posted by Catalina Espinosa View Post
    8.62 In 1992, the FAA conducted 86,991 pre-employment drug tests on job applicants who were to be engaged in safety and security-related jobs, and found that 1,143 were positive.

    (a) Construct a 95 percent confidence interval for the population proportion of positive drug tests.

    (b) Why is the normality assumption not a problem, despite the very small value of p? (Data are from Flying 120, no. 11 [November 1993], p. 31.)
    Asked by another member weeks ago. Answer given. Read http://www.mathhelpforum.com/math-he...-homework.html thread.

    Thread closed.
    Last edited by mr fantastic; April 22nd 2009 at 02:58 AM.
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