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Improved Chen-Stein bounds on the probability of a union. (English) Zbl 1358.60040

Summary: We improve the Chen-Stein bounds when applied to the probability of a union. When the probability is small, the improvement in the distance from the lower to the upper bound is roughly a factor of 2. Further improvements are determined when the events of the union are either negatively or positively dependent.

MSC:

60E15 Inequalities; stochastic orderings
60E99 Distribution theory