Homework: HW 4.3 Score: 0 of 1 pt 4.3.37 Save | 19 of 19(9complete) HW Score: 43

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Homework: HW 4.3 Score: 0 of 1 pt 4.3.37 Save | 19 of 19(9complete) HW Score: 43.86%, 8.33 of 19 pts E Question Help Use the following results from a test for marjuana use, which is provided by a certain drug testing company. Among 141 subjects with positive test results, there are 30 false positive results; among 151 negative results, there are 4 false negative results. If one of the test subjects is randomiy selected, find the probability of a false positive or false negative. (Hint Construct a table.) What does the result suggest about the tests accuracy? The probability of a faise positive or false negative is Round to three decimal places as needed.)

Explanation / Answer

Total = 141 Total =   151

Probability(FP or FN ) = (FP +NP) / (P+N) = (30+4) / (141+151) = 34/292 = 0.116

Accuracy = (TP+TN) / (P+N) = (111+147)/141+151 = 258/292 = 0.884

Observed | Predicted Positive Negative Positive TP = 111 FN = 4 Negative FP = 30 TN = 147

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