Bayes’ theorem

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“In simple form: P(A | B) = P(B | A)/P(B). When B is a compound event consisting of many similar events, the denominator is written ∑ P( B | A=i) P(A=i). The theorem is commonly used to find values when events are sequenced or some data is unavailable. Knowing only the probabilities P(B | A=i), it is possible to compute the reverse P(A | B). The rule is easiest to see with a decision tree or contingency table.”

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By |February 1st, 2019|Comments Off on Bayes’ theorem