5.110 testing for hiv, continued. the previous exercise gives data on

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5.110 Testing for HIV, continued. The previous exercise gives data on the results of EIA tests for the presence of antibodies to HIV. Repeat part (c) of that exercise for two different populations:

 

 

 

(a) Blood donors are prescreened for HIV risk factors, so perhaps only 0.1% (0.001) of this population carries HIV antibodies.

 

 

 

 

 

 

 

(b) Clients of a drug rehab clinic are a high-risk group, so perhaps 10% of this population carries HIV antibodies.

 

 

 

 

 

 

(c) What general lesson do your calculations illustrate?