Biostatistics & Research · single question
A COVID-19 test correctly identifies 99% of healthy (uninfected) people as negative. The 99% figure describes the test's:
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Correct answer: B. Specificity
- A. Sensitivity refers to correctly identifying the diseased, not the healthy.
- B. Correct. Correctly labeling healthy people as negative is specificity (true negatives among the non-diseased).
- C. PPV depends on prevalence and is the chance a positive test is truly positive.
- D. Prevalence is how common the disease is, not a test property.
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