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1 106/1 統計系 林志娟 教授 期刊論文 發佈 A Revisit to Test the Equality of Variances of Several Populations , [106-1] :A Revisit to Test the Equality of Variances of Several Populations期刊論文A Revisit to Test the Equality of Variances of Several Populations英文Chang Ching-Hui; Nabendu Pal; Lin Jyh-Jiuan,F-distribution chi-square distribution;Power;Size;Unbalanced design;VarianceCommunications in Statistics - Simulation and Computation 46(8), p.6360-6384We revisit the problem of testing homoscedasticity (or, equality of variances) of several normal populations which has applications in many statistical analyses, including design of experiments. The standard text books and widely used statistical packages propose a few popular tests including Bartlett's test, Levene's test and a few adjustments of the latter. Apparently, the popularity of these tests have been based on limited simulation study carried out a few decades ago. The traditional tests, including the classical likelihood ratio test (LRT), are asymptotic in nature, and hence do not perform well for small sample sizes. In this paper we propose a simp
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