Use the following results from a test for marijuana use, which is provided by a

Question

Use the following results from a test for marijuana use, which is provided by a certain drug testing company. Among 150 subjects with positive test results, there are 20 false positive results; among 160 negative results, there are 4 false negative results. If one of the test subjects is randomly selected, find the probability of a false positive or false negative. (Hint: Construct a table.) What does the result suggest about the test's accuracy? The probability of a false positive or false negative is (Round to three decimal places as needed.)

Explanation / Answer

Total results = 150+160 = 310

Total False Positive or Falee negative = 20+4 = 24

So, P( False Positive or False negative) = 24/310

= 0.077

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