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![iPhone 11 Pro Max - 2-6.png](https://static.wixstatic.com/media/626b41_c681ceb25fc94ece98b958f89e4d6817~mv2.png/v1/fill/w_134,h_140,al_c,q_85,usm_0.66_1.00_0.01,enc_auto/iPhone%2011%20Pro%20Max%20-%202-6.png)
False Positive
Interactive tool for understanding medical testing probability.
Probabilities
The probabilities are shown by default. These describe what your chances are of having the disease given a certain result.
![Simulator Screen Shot - iPhone 11 - 2020](https://static.wixstatic.com/media/626b41_a1a2c7d0c7f44840b343663c3a17d304~mv2.png/v1/fill/w_204,h_426,al_c,q_85,usm_0.66_1.00_0.01,enc_auto/Simulator%20Screen%20Shot%20-%20iPhone%2011%20-%202020.png)
![Simulator%20Screen%20Shot%20-%20iPhone%2](https://static.wixstatic.com/media/626b41_50cbb34e877c4138adeb8c57c656a07c~mv2.jpg/v1/fill/w_204,h_363,al_c,q_80,usm_0.66_1.00_0.01,enc_auto/Simulator%2520Screen%2520Shot%2520-%2520iPhone%252.jpg)
Actuals
Click the Actuals tab where you can see the distribution of hypothetical test results based on your parameters.
More Details
Click on the info button for an in-depth discussion of what all of these numbers mean and how they are derived using math!
![Simulator Screen Shot - iPhone 11 - 2020](https://static.wixstatic.com/media/626b41_8ef5ff1486644c3ab31e0c4b44a7a0e8~mv2.png/v1/fill/w_157,h_340,al_c,q_85,usm_0.66_1.00_0.01,blur_3,enc_auto/Simulator%20Screen%20Shot%20-%20iPhone%2011%20-%202020.png)
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