Compute the probability that a person who tests positive actually has the disease.
A certain disease has an incidence rate of 0.3%. If the false negative rate is 4% and the false positive rate is 1%, compute the probability that a person who tests positive actually has the disease.
The false positive rate is 1%, so the probability that somebody who tests positive doesn't have the disease is 1% or 0.01. Therefore the probability that somebody who tests positive has the disease is 99% or 0.99.
Answer: 99%
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