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

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

(b) Why is the normality assumption not problem, despite the very small value of p?

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  • Category:- Statistics and Probability
  • Reference No.:- M917101

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