Double CronbachAlpha(TMtx Data)
The Cronbach Alpha coefficient.
| # | Name | Type | Description |
|---|---|---|---|
| 1 | Data | TMtx | source TMtx |
Returns: Double - 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).