When the CERN teams reported a ‘five-sigma’ result for the Higgs boson, corresponding to a P-value of around 1 in 3.5 million, the BBC reported the conclusion correctly, saying this meant ‘about a one-in-3.5 million chance that the signal they see would appear if there were no Higgs particle.’ But nearly every other outlet got the meaning of this P-value wrong. For example, Forbes Magazine reported, ‘The chances are less than 1 in a million that it is not the Higgs boson’, a clear example of the prosecutor’s fallacy.
