Confidence interval for proportion of positive drug test

Reference no: EM13145781

In 1992, the FAA conducted 90,000 pre-employment drug tests on job applicants who were to be engaged in safety and security-related jobs, and found that 2,100 were positive. (Round p to at least three decimal places!)

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

(b) Why may you assume that this is a normal distribution?

Reference no: EM13145781

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