Use the table below to answer the questions which follow. a) Find the probabilit

Question

Use the table below to answer the questions which follow. a) Find the probability of selecting someone who got a result that is a false negative. b) Find the probability of selecting someone who got a result that is a false positive. c) Find the probability of selecting someone who uses drugs. d) Find the probability of selecting someone who does not use drugs. e) If one of the test subjects is randomly selected, find the probability that the subject had a positive test result or a negative test result. If one of the test subjects is randomly selected, find the probability that the subject had a positive test result or does not use drugs. g) If one of the test subjects is randomly selected, find the probability that the subject had a negative test result or does not use drugs. h) If one of the test subjects is randomly selected, find the probability that the subject had a negative result or uses drugs.

Explanation / Answer

G) The probability that the subject had a negative test result is

Total number of negative test results is 866

Total number of true negative is 860

P= Total number of true negative/ Total number of negative test results

= 860/866

=0.99

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