Browse the glossary:
For treatment effect estimates, the p-value is the probability (ranging from 0 to 1) that the results observed in a study could have occurred by the play of chance, if the treatment to which participants were allocated actually had no impact on the outcome.
Because p-values are often misinterpreted, and are less informative than confidence intervals, we recommend using confidence intervals rather than p-values to assess the extent of uncertainty due to the play of chance around effect estimates.
confidence interval · precision
If you feel that this definition hasn't helped you to understand the term, click on our monkey to let us know.