Journal of the Korean Statistical Society

The Korean Statistical Society (한국통계학회)
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An Adaptive Test for Ordered Interqartile Ranges among Several Distributions

  • Park, Chul-Gyu (Department of Applied Statistics, University of Suwon)
  • Published : 2001.03.01
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Abstract

An adaptive estimation and testing method is proposed for comparing dispersions among several ordered groups. Based upon the large sampling theory for nonparametric quartile estimators, we derive the order restricted estimators and construct a simple test statistic. This test statistic has a mixture of several chi-square distributions as its asymptotic null distribution. The proposed test is illustratively applied to survival time data for the patients with carcinoma of the oropharynx.

Keywords

References

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