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{{StatsPsy}}

{{StatsPsy}}

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In [[statistics]], a ''' concordant pair''' is a pair of a two-variable (bivariate) observation data-set '''X'''<sub>''1''</sub>,'''Y'''<sub>''1''</sub>} and {'''X'''<sub>''2''</sub>,'''Y'''<sub>''2''</sub>}, where:

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In [[statistics]], a ''' concordant pair''' is a pair of a two-variable (bivariate) observation data-set

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:<math> \sgn (X_2 - X_1)\ = \sgn (Y_2 - Y_1)\ </math>

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'''Article wouldnt copy over from WP needs attention'''

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Correspondingly, a ''' discordant pair''' is a pair, as defined above, where

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:<math> \sgn (X_2 - X_1)\ = - \sgn (Y_2 - Y_1)\ </math>

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and the sign function, often represented as '''sgn''', is defined as:

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:<math> \sgn x = \left\{ \begin{matrix}

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-1 & : & x < 0 \\

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0 & : & x = 0 \\

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1 & : & x > 0 \end{matrix} \right. </math>

==See also==

==See also==

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==References==

==References==

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*[http://www.utdallas.edu/~herve/Abdi-KendallCorrelation2007-pretty.pdf Kendall rank correlation.]

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* Kendall, M. (1948) ''Rank Correlation Methods'', Charles Griffin & Company Limited

* Kendall, M. (1948) ''Rank Correlation Methods'', Charles Griffin & Company Limited

* Kendall, M. (1938) "A New Measure of Rank Correlation", Biometrica, 30, 81-89.

* Kendall, M. (1938) "A New Measure of Rank Correlation", Biometrica, 30, 81-89.

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* [http://www-groups.dcs.st-and.ac.uk/~history/Biographies/Kendall.html MacTutor: David George Kendall]

* [http://www-groups.dcs.st-and.ac.uk/~history/Biographies/Kendall.html MacTutor: David George Kendall]

* [http://janus.lib.cam.ac.uk/db/node.xsp?id=EAD%2FGBR%2F0014%2FKNDL Janus: The Papers of Professor David Kendall]

* [http://janus.lib.cam.ac.uk/db/node.xsp?id=EAD%2FGBR%2F0014%2FKNDL Janus: The Papers of Professor David Kendall]

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*[http://www.utdallas.edu/~herve/Abdi-KendallCorrelation2007-pretty.pdf Kendall rank correlation.]

[[Category:Statistics]]

[[Category:Statistics]]

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In statistics , a concordant pair is a pair of a two-variable (bivariate) observation data-set

Article wouldnt copy over from WP needs attention

References Edit
Kendall, M. (1948) Rank Correlation Methods , Charles Griffin & Company Limited
Kendall, M. (1938) "A New Measure of Rank Correlation", Biometrica, 30, 81-89.
External links Edit
{{enWP|Concordant pair}