Bayes'+Theorem

This GeoGebra worksheet can be used to explore the following problem, which is a classic application of Bayes' theorem: If a person tests positive for a disease, what is the probability that he or she is actually infected?

The user can enter the following quantities by using the input boxes or the sliders:
 * **Incidence** is the percentage of the general population that is infected.
 * **False positive rate** is the probability that a person who is not infected will test positive for the disease.
 * **False negative rate** is the probability that a person who is infected will test negative for the disease.

The pie chart shows the conditional probability that a person is infected given that he or she tests positive for the disease.

Comments or suggestions are welcome. Enjoy!

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 * Addendum:** Dave Richeson had a [|similar idea].

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