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Statistics
A Journal of Theoretical and Applied Statistics
Volume 20, 1989 - Issue 4
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Original Articles

On sums of independent gamma eandom yariames

Pages 583-591 | Published online: 24 May 2010
 

Abstract

This paper gives the exact probability density function of a sum of independent gamma random variables in terms of infinite series. This representation is obtained by means of the technique of the inverse MELLIN transform and is used to derive the distri¬bution function of a ratio of sums of independent gamma random variables whose numera¬tor and denominator may have variables in common.

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