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What is the sensitivity of the test

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A new cancer screen method was tested on 500 individuals know to have or not have cancer. The results are tabulated below.

Cancer ( C ) No cancer (NC) Total

Positive test (P) 95 50 145
Negative test (N) 5 350 355
Total 100 400 500

Assuming one of these individuals is selected at random, what is the probability that the person

1. Has cancer, P(C) = _______________________

2. Tested positive, P(P) = ____________________

3. Tested positive and had cancer, P(P ∩ C) =________________________

4. Tested negative and had cancer, P(N ∩ C) = ____________________

5. What is the sensitivity of the test? Provide a definition and the actual probability.

6. What is the specificity of the test? Provide a definition and the actual probability.

7. What is the PV+ of the test? Provide a definition and the actual probability.

8. What is the PV- of the test? Provide a definition and the actual probability.

Reference no: EM132851909

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