Log-likelihood ratio test for a symmetric Dirichlet distribution: Log-likelihood ratio test for a symmetric Dirichlet distribution
Description
Log-likelihood ratio test for a symmetric Dirichlet distribution.
Usage
sym.test(x)
Arguments
x
A matrix with the compositional data. No zero values are allowed.
Value
A list including:
est.par
The estimated parameters under the alternative hypothesis.
one.par
The value of the estimated parameter under the null hypothesis.
res
The loglikelihood under the alternative and the null hypothesis, the value of the test statistic, its relevant p-value and the
associated degrees of freedom, which are actually the dimensionality of the simplex, \(D-1\), where \(D\) is the number of
components.
Details
Log-likelihood ratio test is performed for the hypothesis that all Dirichelt parameters are equal.
References
Ng Kai Wang, Guo-Liang Tian and Man-Lai Tang (2011). Dirichlet and related distributions:
Theory, methods and applications. John Wiley & Sons.