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4min chapter
Covid by Numbers with David Spiegelhalter
Intelligence Squared
What Is the False Positive Rate?
Not all tests are made equal, and tests have different performances. How you interpret a test depends crucially on the community in which it's being carried out. People struggle with terms like false positive and false negative r because everyone gets them mixed up. And when there's lots of virus floating around, the problem becomes false negatives. So only these really tricky issues can be resolved - they're so deeply unintuitive and so deeply difficult to understand.
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