Use the following results from a test for marijuana use, which is provided by a certain drug testing cor 146 subjects with positive test results, there are 25 false positive results; among 151 negative results, false negative results. If one of the test subjects is randomly selected, find the probability that the sub negative or did not use marijuana. (Hint: Construct a table.) The probability that a randomly selected subject tested negative or did not use marijuana is (Do not round until the final answer. Then round to three decimal places as needed.)

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Use the following results from a test for marijuana use, which is provided by a certain drug testing company. Among
146 subjects with positive test results, there are 25 false positive results; among 151 negative results, there are 5
false negative results. If one of the test subjects is randomly selected, find the probability that the subject tested
negative or did not use marijuana. (Hint: Construct a table.)
The probability that a randomly selected subject tested negative or did not use marijuana is
(Do not round until the final answer. Then round to three decimal places as needed.)
Transcribed Image Text:Use the following results from a test for marijuana use, which is provided by a certain drug testing company. Among 146 subjects with positive test results, there are 25 false positive results; among 151 negative results, there are 5 false negative results. If one of the test subjects is randomly selected, find the probability that the subject tested negative or did not use marijuana. (Hint: Construct a table.) The probability that a randomly selected subject tested negative or did not use marijuana is (Do not round until the final answer. Then round to three decimal places as needed.)
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Contingency Table

  Positive Negative Total
use marijuana 121 5 126
did not use marijuana 25 146 171
Total 146 151 297
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