Problema Solution
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 1,143 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.
Answer provided by our tutors
b) the normality distribution is not a bproble since the sample value si very large hence it automaticlaly gains normality