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Absence of evidence is not evidence of absence

December 31, 2018 By editor

A statistical note published in the BMJ (formally the British Medical Journal) reminds us that

…trials that do not show a significant difference between the treatments being compared are often called "negative." This term wrongly implies that the study has shown that there is no difference, whereas usually all that has been shown is an absence of evidence of a difference. These are quite different statements.

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Filed Under: Data analysis, Data science Tagged With: p-values, statistics

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