A screening test gave 80 true positives, 20 false negatives, 20 false positives and 480 true negatives. What is the positive predictive value?
Answer and explanation
Correct answer: B. 80%
- Step 1: The positive predictive value is the share of positive results that are true: TP / (TP + FP).
- Step 2: 80 / (80 + 20) = 80%.
Answer
80%.
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