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On the distribution of linear combinations of the components of a Dirichlet random vector
Author(s) -
Provost Serge B.,
Cheong YoungHo
Publication year - 2000
Publication title -
canadian journal of statistics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.804
H-Index - 51
eISSN - 1708-945X
pISSN - 0319-5724
DOI - 10.2307/3315988
Subject(s) - mathematics , multivariate random variable , dirichlet distribution , autocorrelation , statistic , distribution (mathematics) , quadratic form (statistics) , statistics , mathematical analysis , random variable , boundary value problem
On making use of a result of Imhof, an integral representation of the distribution function of linear combinations of the components of a Dirichlet random vector is obtained. In fact, the distributions of several statistics such as Moran and Geary's indices, the Cliff‐Ord statistic for spatial correlation, the sample coefficient of determination, F ‐ratios and the sample autocorrelation coefficient can be similarly determined. Linear combinations of the components of Dirichlet random vectors also turn out to be a key component in a decomposition of quadratic forms in spherically symmetric random vectors. An application involving the sample spectrum associated with series generated by ARMA processes is discussed.

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