*Choose Index below for a list of all words and phrases defined in this glossary.*

**Alpha Risk** - Alpha risk is defined as the risk of rejecting the Null hypothesis when in fact it is true. Synonymous with: Type I error, Producers Risk. In other words, stating a difference exists where actually there is none. Alpha risk is stated in terms of probability (such as 0.05 or 5%). The value (1-alpha) corresponds to the confidence level of a statistical test, so a level of significance alpha = 0.05 corresponds to a 95% confidence level.

[Category=Data Quality ]

*Source: iSixSigma, 30 December 2010 08:13:15, https: web.archive.org/web/20111109014246/http:www.isixsigma.com/index.php?option=com_glossary *

Data Quality Glossary. A free resource from GRC Data Intelligence. For comments, questions or feedback: dqglossary@grcdi.nl