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Science 19 November 1999:
Vol. 286. no. 5444, p. 1461
DOI: 10.1126/science.286.5444.1461
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News Focus

STATISTICS:
A Brief Guide to Bayes Theorem

David Malakoff

In making sense of new data, traditional statistical methods ignore the past. Bayesian techniques, in contrast, allow you to start with what you already believe and then see how new information changes your confidence in that belief. Putting Bayes theorem to work requires heavy calculus--now aided by computer models--but the fundamental concept is straightforward.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)