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Statistics.CronbachAlpha Method
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The Cronbach Alpha coefficient.

Syntax
C#
Visual Basic
public static double CronbachAlpha([In] TMtx Data);
Returns

the Cronbach Alpha coefficient, defined by the following relation: 

 

where K defines number of items (Data columns) and sigma(i,j) estimated covariance between item i and j.

Remarks

Note Cronbach's Alpha measures how well a set of items (or variables) measures a single unidimensional latent construct. When data have a multidimensional structure, Cronbach's Alpha will usually be low. Technically speaking, Cronbach's Alpha is not a statistical test - it is a coefficient of reliability (or consistency).

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