1. The incidence of breast cancer varies depending on a woman's age. The National Cancer Institute gives the following probabilities for a randomly chosen woman in her 40s who takes a mammography to screen for breast cancer:
3. Reference: Ref 10-6
5. If a randomly chosen woman in her 40s taking the mammography screening test gets a positive test result, the probability that she indeed has breast cancer is the positive predicted value, PPV =P(Cancer | Positive test). The PPV for this age group is
7. 0.012.
8. 0.108.
9. 0.500.
10. 0.800.