Confidence interval-population proportion of positive drug

Reference no: EM13128689

In 1992, the FAA conducted 30,000 pre-employment drug tests on job applicants who were to be engaged in safety and security-related jobs, and found that 1000 were positive.

(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: EM13128689

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