Describing the credibility of the null hypothesis

In the previous page, a diagram with scales illustrated how the evidence against H0 was 'weighed' for different data sets. A p-value is a numerical description of this evidence that can give a scale to this diagram.

A p-value is a numerical summary statistic that describes the evidence against H0


Computer user-interface test

The p-value in this scenario summarises whether a data set is consistent with a population mean, μ, being zero.

P-values have similar interpretation for all hypothesis tests.