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Summarizing Monte Carlo Results in Methodological Research: The One- and Two-Factor Fixed Effects ANOVA Cases

Author

Listed:
  • Michael R. Harwell
  • Elaine N. Rubinstein
  • William S. Hayes
  • Corley C. Olds

Abstract

Meta-analytic methods were used to integrate the findings of a sample of Monte Carlo studies of the robustness of the F test in the one- and two-factor fixed effects ANOVA models. Monte Carlo results for the Welch (1947) and Kruskal-Wallis (Kruskal & Wallis, 1952) tests were also analyzed. The meta-analytic results provided strong support for the robustness of the Type I error rate of the F test when certain assumptions were violated. The F test also showed excellent power properties. However, the Type I error rate of the F test was sensitive to unequal variances, even when sample sizes were equal. The error rate of the Welch test was insensitive to unequal variances when the population distribution was normal, but nonnormal distributions tended to inflate its error rate and to depress its power. Meta-analytic and exact statistical theory results were used to summarize the effects of assumption violations for the tests.

Suggested Citation

  • Michael R. Harwell & Elaine N. Rubinstein & William S. Hayes & Corley C. Olds, 1992. "Summarizing Monte Carlo Results in Methodological Research: The One- and Two-Factor Fixed Effects ANOVA Cases," Journal of Educational and Behavioral Statistics, , vol. 17(4), pages 315-339, December.
    • Handle: RePEc:sae:jedbes:v:17:y:1992:i:4:p:315-339
    DOI: 10.3102/10769986017004315
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