The test for a certain disease is 86% accurate. A hospital tests a sample of 5000 patients for this disease and the incidence rate of the disease is 12%.
Disease
No Disease
Total
Test Positive
Test Negative
If a patient tests negative, what is thepercentchance they have the disease? Round to the nearest 0.1%
Suppose you select a patient at randomfrom this sample, what is theprobabilitythe patient has the diseaseortests positive? Use three significant digits.
What is theprobabilitythat two patients randomly chosenfrom this samplewho do not have the diseasebothtest positive? Use four significant digits.
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