p-value

In statistics, a p-value is the probability that the null hypothesis (the idea that a theory being tested is false) gives for a specific experimental result to happen. p-value is also called probability value. If the p-value is low, the null hypothesis is unlikely, and the experiment has statistical significance as evidence for a different theory.

In many fields, an experiment must have a p-value of less than 0.05 for the experiment to be considered evidence of the alternative hypothesis. In short, a low p-value means a higher chance of the null hypothesis being false.

P-value Media

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  Portrait of John Arbuthnot (1667-1735), the physician

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  PierreSimonLaplace()

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  Portrait of Karl Pearson, 1910.

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  An image of Ronald Fisher in 1913