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| Titel: |
Tests for homogeneity of variance |
| Auteur: |
Keselman, H. J. Gaines, Paul A. Clinch, Jennifer J. |
| Verschenen in: |
Communications in statistics |
| Paginering: | Jaargang 8 (1979) nr. 2 pagina's 113-129 |
| Jaar: |
1979 |
| Inhoud: |
Six procedures which convert tests of homogeneity of variance into tests for mean equality for independent groups are compared. The tests are the analysis of variance (ANOVA) and Welch F statistics. The Welch statistics are included since it was anticipated that ANOVA would not provide a robust test when samples of unequal sizes are obtained from non-normal populations. However, the Welch tests are not found to be uniformly preferrable. In addition, a prior recommendation for Miller's jackknife procedure is not supported for the unequal sample size case. The data indicates that the current tests for variance heterogeneity are either sensitive to non-normality or, if robust, lacking in power. Therefore, these tests cannot be recommended for the purpose of testing the validity of the ANOVA homogeneity assumption. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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