Use the following results from a test for marijuana use. Among 144 subjects with positive test results, there are 21 false positive results. Among 139 negative test results, there are 4 false negative results. a. How many subjects are included in the study? b. How many of the subjects had a true negative result? c. What is the probability that a randomly selected test subject had a true negative result?
Use the following results from a test for marijuana use. Among 144 subjects with positive test results, there are 21 false positive results. Among 139 negative test results, there are 4 false negative results. a. How many subjects are included in the study? b. How many of the subjects had a true negative result? c. What is the probability that a randomly selected test subject had a true negative result?
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 4ECP: Show that the probability of drawing a club at random from a standard deck of 52 playing cards is...
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Question
Use the following results from a test for marijuana use. Among
144
subjects with positive test results, there are
21
false positive results. Among
139
negative test results, there are
4
false negative results.a. How many subjects are included in the study?
b. How many of the subjects had a true negative result?
c. What is the probability that a randomly selected test subject had a true negative result?
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