Positive Predictive Value
The positive predictive value is the proportion of positive results in statistics and diagnostic tests that are true positive results.
The positive predictive value equals the true positive divided by the sum of the true positive and false positive.
Formula
![QuantityVariable["ppv", "Unitless"] == QuantityVariable["tp", "Unitless"]/(QuantityVariable["fp", "Unitless"] + QuantityVariable["tp", "Unitless"])](https://www.wolframcloud.com/objects/resourcesystem/marketplacestorage/resources/ba3/ba3b8051-9e9c-4bde-bb3c-f3f43fa9565f/Webpage/FormulaImage.png "Copy to Clipboard")
| symbol | description | physical quantity |
|---|---|---|
| ppv | positive predictive value | "Unitless" |
| tp | true positives | "Unitless" |
| fp | false positives | "Unitless" |
Forms
Examples
Get the resource:
| In[1]:= | ![ResourceObject["Positive Predictive Value"]](images/ba3/ba3b8051-9e9c-4bde-bb3c-f3f43fa9565f-io-1-i.en.gif){kind=small} |
| Out[1]= |  |
Get the formula:
| In[2]:= | ![FormulaData[ResourceObject["Positive Predictive Value"]]](images/ba3/ba3b8051-9e9c-4bde-bb3c-f3f43fa9565f-io-2-i.en.gif){kind=small} |
| Out[2]= |  |
Use some values:
| In[3]:= | ![FormulaData[
ResourceObject[
"Positive Predictive Value"], {QuantityVariable["fp","Unitless"] ->
2}]](images/ba3/ba3b8051-9e9c-4bde-bb3c-f3f43fa9565f-io-3-i.en.gif){kind=small} |
| Out[3]= |  |