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How stats fool juries - Peter Donnelly

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Oxford mathematician Peter Donnelly reveals the common mistakes humans make in interpreting statistics, along with the devastating impact these errors can have on the outcome of criminal trials. Peter Donnelly is an expert in probability theory who applies statistical methods to genetic data, spurring advances in disease treatment and insight on our evolution. He's also an expert on DNA analysis and an advocate for sensible statistical analysis in the courtroom.

Explain what led an expert witness in the Sally Clark case to offer the statistic “one in 73 million” and what was wrong with that statistic.

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