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 1,043 were positive.

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 1,043 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? (Data are from Flying 120, no. 11 [November 1993], p. 31.)








Leave a Reply