22 and 24

In Exercigeg 2124, refer 'o gamplt dafa in Table 4-1, vhich is included with the Chap- ter Problem. Agrume I offhe $53 ggbjectg included in Table 4-1 is randomly selected. TABLE 4-6 Results from Drug Tests of App*c.nts Subject Uses Drugs Subject Does Not use Drugs Positive test (Test sh&vs drug use) 45 (True Postjve) 25 (False Positwe) Negative Test Result (Test shows no drug use) (Farse Negative) 480 (True Negative) 21. Drug Testing Job Applicants Find the probability of selecting someone who got a result that is a false negative. Who would suffer from a false negative result? Why? 22. Drug Testing Job Applicants Find the probability of selecting someone who got a result that is a false positive. Who would suffer from a false positive result? Why? 23. Drug Testing Job Applicants Find the probability of selecting someone who uses drugs s Does the result appear to be reasonable as an estimate of the "prevalence rate" described in the Chapter Problem ? 24. Drug Testing Job Applicants Find the probability of selecting someone who does use drugs. Does the result appear to be reasonable as an estimate of the proportion of the adult population that does not use drugs?