Confidence interval for population proportion of drug test

Reference no: EM1319823

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

[A] Why is the normality assumption not a problem, despite the very small value of p?
[B] Construct a 95% confidence interval for the population proportion of positive drug tests.

Reference no: EM1319823

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