Question: 23. Probability of a Wrong Result Table 4-1 shows that among 178 subjects who did not use marijuana, the test result for marijuana usage was

23. Probability of a Wrong Result Table 4-1 shows that among 178 subjects who did not use marijuana, the test result for marijuana usage was wrong 24 times.

a. Based on the available results, find the probability of a wrong test result for a person who does not use marijuana.

b. Is it “unusual” for the test result to be wrong for those not using marijuana?

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