On the bootstrap quantile-treatment-effect test

Man-Lai Tang*, Maozai Tian, Ping-Shing Chan

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

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Abstract

Let {X1,..., Xn} and {Y1,..., Ym} be two samples of independent and identically distributed observations with common continuous cumulative distribution functions F(x) = P(X ≤ x) and G(y) = P(Y ≤ y), respectively. In this article, we would like to test the no quantile treatment effect hypothesis H0: F = G. We develop a bootstrap quantile-treatment-effect test procedure for testing H0 under the location-scale shift model. Our test procedure avoids the calculation of the check function (which is non-differentiable at the origin and makes solving the quantile effects difficult in typical quantile regression analysis). The limiting null distribution of the test procedure is derived and the procedure is shown to be consistent against a broad family of alternatives. Simulation studies show that our proposed test procedure attains its type I error rate close to the pre-chosen significance level even for small sample sizes. Our test procedure is illustrated with two real data sets on the lifetimes of guinea pigs from a treatment-control experiment.

Original languageEnglish
Pages (from-to)335-350
Number of pages16
JournalJournal of Applied Statistics
Volume35
Issue number3
DOIs
Publication statusPublished - Mar 2008

Scopus Subject Areas

  • Statistics and Probability
  • Statistics, Probability and Uncertainty

User-Defined Keywords

  • Brownian bridge
  • bootstrap
  • Monte Carlo simulation
  • order statistics
  • two-sample case
  • quantile-treatment-effects

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