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CORRECTION TO “STOCHASTIC COMPARISONS OF PARALLEL SYSTEMS WHEN COMPONENTS HAVE PROPORTIONAL HAZARD RATES”

Published online by Cambridge University Press:  27 May 2008

Subhash Kochar  and
Maochao Xu
Subhash Kochar
Affiliation:
Department of Mathematics and StatisticsPortland State University, Portland, OR 97201 E-mail: [email protected]
Maochao Xu
Affiliation:
Department of Mathematics and StatisticsPortland State University, Portland, OR 97201 E-mail: [email protected]
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Extract

In our article [3] we have found a gap in the middle of the proof of Theorem 3.2. Therefore, we do not know whether Theorem 3.2 is true for the reverse hazard rate order. However, we could prove the following weaker result for the stochastic order.

Type
Research Article
Information
Probability in the Engineering and Informational Sciences , Volume 22 , Issue 3 , July 2008 , pp. 473 - 474
Copyright
Copyright © Cambridge University Press 2008

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References

1David, H.A. & Nagaraja, H.N. (2003). Order statistics, 3rd ed. New York: Wiley.CrossRefGoogle Scholar
2Kochar, S.C. & Rojo, J. (1996). Some new results on stochastic comparisons of spacings from heterogeneous exponential distributions. Journal of Multivariate Analysis 59: 272–281.Google Scholar
3Kochar, S. & Xu, M. (2007). Stochastic comparisons of parallel systems when components have proportional hazard rates. Probability in the Engineering and Informational Sciences 21: 597–609.Google Scholar