P value

noun

: the probability of an event or outcome in a statistical experiment
specifically : level of significance

Examples of P value in a Sentence

Recent Examples on the Web
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These data are not subject to multiple comparisons effects because the P value is simply a criterion for a binary partition of the dataset. — Neuroskeptic, Discover Magazine, 20 Oct. 2017

Word History

Etymology

probability

First Known Use

1947, in the meaning defined above

Time Traveler
The first known use of P value was in 1947

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Cite this Entry

“P value.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/P%20value. Accessed 4 Oct. 2026.

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