Question: Suppose that 8% of the patients tested in a clinic are infected with HIV. Furthermore, suppose that when a blood test for HIV is given, 98% of the patients infected with HIV test positive and that 3% of the patients not infected with HIV test positive. What is the probability that
a) a patient testing positive for HIV with this test is infected with it?
b) a patient testing positive for HIV with this test is not infected with it?
c) a patient testing negative for HIV with this test is infected with it?
d) a patient testing negative for HIV with this test is not infected with it?