ag.test: A Function to Perform Alexander-Govern Test
Description
ag.test performs Alexander-Govern test.
Usage
ag.test(y, group)
Arguments
y
a numeric vector of data values.
group
a vector or factor object giving the group for the corresponding elements of y.
Value
Returns a list containing following elements:
statisticthe Alexander-Govern statistic.
dfthe degrees of freedom of the approximate chi-squared distribution of the test statistic.
p.valuethe p-value of the test.
References
Schneider, P. J., Penfield, D. A. (1997). Alexander and Govern's Approximation: Providing an Alternative to ANOVA Under Variance Heterogeneity. The Journal of Experimental Education, 65:3, 271-286.