BAYES' THEOREM CALCULATOR
(also available as a Mathematica cdf file)
This program considers a test for a disease . Use the sliders to input:
(also available as a Mathematica cdf file)
This program considers a test for a disease . Use the sliders to input:
- the prevalence of the disease, $Pr($Have the disease$)$
i.e. how common the disease is in the general population. - The sensitivity of the test, $Pr($Positive test $|$ Have the disease$)$
i.e. how often the test correctly identifies people we know have the disease. - The specificity of the test, $Pr($Negative test $|$ Do not have the disease$)$
i.e. how often the test correctly identifies people we know do not have the disease
- The true positive rate, $Pr($Have the disease $|$ Positive test$)$
i.e. the probability that someone with a positive test has the disease - The true negative rate, $Pr($Do not have the disease $|$ Negative test$)$
i.e. the probability that someone with a positive test has the disease