# p-value

(redirected from*Marginal significance level*)

## p-value

The probability, expressed as a number, that a particular effect or association is real or that a given statement or hypothesis is true. If a trial has*n*possible outcomes and

*m*of these are the desired outcome, then the probability (

*p*) of obtaining the desired outcome is

*m*/

*n*. If all the outcomes are as desired then

*m*=

*n*and

*p*= 1. If none are as desired

*p*= 0. So

*p*is a measure that will alwys range from 0 to 1.

*p*-value,

*n*in statistics, the probability that a random variable will be found to have a value equal to or greater than the observed value by chance alone. This value provides an objective basis from which to assess the relative change in the data.

Want to thank TFD for its existence? Tell a friend about us, add a link to this page, or visit the webmaster's page for free fun content.

Link to this page: