Contingency Table

Contingency Table - An application used to test the relationship between two variables. For example, a financial research firm decides to investigate whether there is a relationship between reports that are completed in less than or equal to 3 days and those that make accurate predictions. The hypothesis is: H0 there is no relationship between less than or equal to 3-day completion and accurate predictions. H1 there is a relationship between less than or equal to 3-day completion and accurate predictions.

                            Accurate                 Not Accurate                Total

   Equal or Less Than 3     53                             23                     76

   Greater Than 3           78                             42                     120

   Total                    131                            65                     196

The table allows us to glance at the proportion of reports that are less than or equal to 3 days and greather than 3 days versus accuracy and non-accuracy; however, the proportions are not equal so the statistical significance of the difference between the variables can be tested with formulas such as the Chi Square (or 'Goodness of Fit') test, G-test or Fisher's exact test.

[Category=Data Quality ]

Source: iSixSigma, 08 January 2011 08:13:29, https:web.archive.org/web/20111109014246/http:www.isixsigma.com/index.php?option=com_glossary

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Contingency Table - a two-dimensional table constructed for classifying count data, the purpose of which is to determine whether two variables are dependent (or contingent) on each other.

[Category=Quality ]

Source: The Quality Portal, 04 April 2011 07:54:27, http://thequalityportal.com/glossary/b.htm