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Related Experiment Videos

On tests against one-sided hypotheses in some generalized linear models

M J Silvapulle1

  • 1School of Agriculture, La Trobe University, Bundoora, Australia.

Biometrics
|September 1, 1994
PubMed
Summary

One-sided hypothesis testing offers increased statistical power by utilizing directional information. This study demonstrates the asymptotic equivalence of various one-sided tests in generalized linear and Cox regression models.

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Area of Science:

  • Biostatistics
  • Statistical Modeling
  • Regression Analysis

Background:

  • One-sided hypotheses are common in scientific research, necessitating specialized testing.
  • Standard two-sided tests may not fully leverage available directional information.
  • Increasing statistical power is a key objective in hypothesis testing.

Purpose of the Study:

  • To evaluate the performance of various one-sided hypothesis tests.
  • To demonstrate the asymptotic equivalence of these tests in terms of local power.
  • To extend known results for two-sided alternatives to one-sided scenarios.

Main Methods:

  • Consideration of likelihood ratio, Wald, score, generalized distance, and Pearson chi-square test statistics.
  • Analysis within a class of models including generalized linear and Cox regression.

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  • Asymptotic analysis of local power for different test statistics.
  • Main Results:

    • The analyzed one-sided test statistics demonstrate asymptotic equivalence in local power.
    • This equivalence generalizes findings previously established for two-sided hypothesis testing.
    • The study provides a theoretical foundation for choosing among these tests.

    Conclusions:

    • One-sided tests effectively utilize directional information, enhancing statistical power.
    • The asymptotic equivalence simplifies test selection in generalized linear and Cox models.
    • Applications include testing interactions in binomial models and comparing ordinal responses.