Use the following results from a test for marijuana use, which is provided by a
ID: 3293995 • Letter: U
Question
Use the following results from a test for marijuana use, which is provided by a certain drug testing company. Among
142
subjects with positive test results, there are
29
false positive results; among
150
negative results, there are
5
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
nothing.
Explanation / Answer
P(False positive or false negative)
= (29+5)/(142+150)
= 34/292
= 17/146
= 0.116