GKgamma: Calculate Goodman-Kruskal Gamma for ordered tables
Description
The Goodman-Kruskal $\gamma$ statistic is a measure of
association for ordinal factors in a two-way table proposed by
Goodman and Kruskal (1954).
Usage
GKgamma(x, level = 0.95)
Arguments
x
A two-way frequency table, in matrix or table form. The rows and columns
are considered to be ordinal factors
level
Confidence level for a significance test of $\gamma \ne =$
Value
Returns an object of class "GKgamma" with 6 components, as follows
gammaThe gamma statistic
CTotal number of concordant pairs in the table
DTotal number of disconcordant pairs in the table
sigmaStandard error of gamma
CIlevelConfidence level
CIConfidence interval
References
Agresti, A. Categorical Data Analysis. John Wiley & Sons, 2002,
pp. 57--59.
Goodman, L. A., & Kruskal, W. H. (1954). Measures of
association for cross classifications. Journal of the
American Statistical Association, 49, 732-764.
Goodman, L. A., & Kruskal, W. H. (1963). Measures of
association for cross classifications III: Approximate
sampling theory. Journal of the American Statistical
Association, 58, 310-364.