A blood test indicates the presence of a particular disease 97% of the time when the disease is actually present. The same test indicates the presence of the disease 1.3% of the time when the disease is not present. It is known that 2% of the population actually has the disease. If a person gets tested and the test turns positive (suggesting the disease), what is the probability that the person does have the disease?

Answer 1

The probability that the person does have the disease is 95.7%.