Explore BrainMass

Explore BrainMass

    Confidence Interval for a Population Proportion

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    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?

    © BrainMass Inc. brainmass.com June 3, 2020, 9:29 pm ad1c9bdddf
    https://brainmass.com/statistics/confidence-interval/confidence-interval-for-a-population-proportion-184458

    Solution Summary

    Step-by-step determination of the confidence interval. The other question is also answered.

    $2.19

    ADVERTISEMENT