Some new results on stochastic comparisons of spacings from heterogeneous exponential distributions
Journal of Multivariate Analysis
Stochastic comparisons of parallel systems when components have proportional hazard rates
Probability in the Engineering and Informational Sciences
Stochastic order of sample range from heterogeneous exponential random variables
Probability in the Engineering and Informational Sciences
On the range of heterogeneous samples
Journal of Multivariate Analysis
Order statistics from heterogenous negative binomial random variables
Probability in the Engineering and Informational Sciences
On the sample ranges from heterogeneous exponential variables
Journal of Multivariate Analysis
On sample ranges in multiple-outlier models
Journal of Multivariate Analysis
On sample ranges from two sets of heterogenous random variables
Journal of Multivariate Analysis
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The purpose of this article is to present several equivalent characterizations of comparing the largest-order statistics and sample ranges of two sets of n independent exponential random variables with respect to different stochastic orders, where the random variables in one set are heterogeneous and the random variables in the other set are identically distributed. The main results complement and extend several known results in the literature. The geometric distribution can be regarded as the discrete counterpart of the exponential distribution. We also study the orderings of the largest-order statistics from geometric random variables and point out similarities and differences between orderings of the largest-order statistics from geometric variables and from exponential variables.