Prevalence - Sensitivity Analysis | Statistics

Prevalence: How rare a disease is, and how it affects PPV and NPV
A rare disease has a prevalence near 0.
The more common a disease, the greater the prevalence.

Statistics,Prevalence,Sensitivity Analysis,math,mathematics,Quantifying,tests for diseases,true positive,true negative,tested negative,tested positive,type I error,type II error,calculate,Sensitivity and specificity,PPV,positive predictive value,NPV,negative predictive value,Sensitivity vs. specifity,cutoff selection,and ROC curves,PEDs,probability,