Communications for Statistical Applications and Methods

The Korean Statistical Society (한국통계학회)
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A new flexible Weibull distribution

  • Park, Sangun (Department of Applied Statistics, Yonsei University) ;
  • Park, Jihwan (Department of Applied Statistics, Yonsei University) ;
  • Choi, Youngsik (Department of Applied Statistics, Yonsei University)
  • Received : 2016.07.04
  • Accepted : 2016.09.11
  • Published : 2016.09.30
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Abstract

Many of studies have suggested the modifications on Weibull distribution to model the non-monotone hazards. In this paper, we combine two cumulative hazard functions and propose a new modified Weibull distribution function. The newly suggested distribution will be named as a new flexible Weibull distribution. Corresponding hazard function of the proposed distribution shows flexible (monotone or non-monotone) shapes. We study the characteristics of the proposed distribution that includes ageing behavior, moment, and order statistic. We also discuss an estimation method for its parameters. The performance of the proposed distribution is compared with existing modified Weibull distributions using various types of hazard functions. We also use real data example to illustrate the efficiency of the proposed distribution.

Keywords

References

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