Diagnostic Test Performance Practice Test

A new rapid antigen test for a highly contagious respiratory virus is being evaluated. Researchers want to determine the test's ability to correctly identify patients who truly have the viral infection, as confirmed by PCR testing.

A pharmaceutical company develops a new biomarker for early-stage pancreatic cancer. A study is designed to assess how well the biomarker test performs in a large group of healthy, asymptomatic individuals by determining the proportion of individuals who correctly test negative.