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Poisson approximation for a sum of dependent indicators: an alternative approach

Published online by Cambridge University Press:  01 July 2016

N. Papadatos*
Affiliation:
University of Athens
V. Papathanasiou*
Affiliation:
University of Athens
*
Postal address: Section of Statistics and Operational Research, Department of Mathematics, University of Athens, Panepistemiopolis, 157 84 Athens, Greece.
Postal address: Section of Statistics and Operational Research, Department of Mathematics, University of Athens, Panepistemiopolis, 157 84 Athens, Greece.

Abstract

The random variables X1, X2, …, Xn are said to be totally negatively dependent (TND) if and only if the random variables Xi and ∑jiXj are negatively quadrant dependent for all i. Our main result provides, for TND 0-1 indicators X1, x2, …, Xn with P[Xi = 1] = pi = 1 - P[Xi = 0], an upper bound for the total variation distance between ∑ni=1Xi and a Poisson random variable with mean λ ≥ ∑ni=1pi. An application to a generalized birthday problem is considered and, moreover, some related results concerning the existence of monotone couplings are discussed.

Type
General Applied Probability
Copyright
Copyright © Applied Probability Trust 2002 

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Footnotes

Research partially supported by the research foundation of the University of Athens.

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