Tuesday, September 29, 2020


… False positive tests | Dr. Malcolm Kendrick. (Hat tip, Dave Lull.)

A false negative is a result which informs someone that they do not have a disease, when in fact they do. 
A false positive is a result which informs someone they do have a disease, when they don’t.
Ideally a test should never give a false negative (100% sensitivity) nor give a false positive (100% specificity). There is no known test that does this. In general, there is a trade-off going on between these two measures.

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