# Statistical comparisons of n alpha coefficients

### Description

Performs a test of significance for the difference between *n* alpha coefficients (Cronbach,
1951). The function expects raw data input from which the alpha coefficients are calculated.

### Usage

1 2 |

### Arguments

`data` |
A list holding two or more data.frames/matrices with rows and columns corresponding to individuals and items, respectively. From each data.frame/matrix an alpha coefficients is determined. |

`dep` |
A logical indicating whether the alpha coefficients are based on dependent groups of individuals |

`standardized` |
A logic indicating whether a standardized Cronbach alpha should be calculated (default is FALSE). |

`los` |
A number indicating the level of significance (default is |

`conf.level` |
A number defining the level of confidence for the confidence intervals of the alpha coefficients (default is |

### Details

To compare *n* dependent or independent alpha coefficients (Cronbach, 1951),
the methods by Feldt, Woodruff,
and Salih (1987) implemented in cocron.n.coefficients are used.

### Value

Returns an object of the class "`cocron.n.coefficients`

" (see cocron.n.coefficients).

### References

Cronbach,
L. J. (1951). Coefficient alpha and the internal structure of tests. *Psychometrika*, *16*, 297-334.

Feldt, L. S., Woodruff, D. J., & Salih,
F. A. (1987). Statistical inference for coefficient alpha. *Applied Psychological Measurement*, *11*, 93-103.

### See Also

cocron.n.coefficients, cocron.two.coefficients

### Examples

1 2 3 4 5 6 7 |