PH 384: Epidemiology Chapter 9 Assignment (10 points possible) 1. WKU is trying to determine whether to screen students for disease X, which is highly communicable and preventable. Preliminary data from a pilot test showed the following results: of the 1,000 people who actually had disease X, 680 tested positive. Of the 3,000 people without the disease, 400 tested positive. a. Complete a 2 x 2 using the information provided and answer the following questions: b. What is the sensitivity of the screening test? C. What is the specificity of the screening test? d. What is the PPV of the screening test? e. What is the NPV of the screening test? f. Provide a summary for the screening test using information from your 2 x 2 Table