Approximate sample size formulas for the two-sample trimmed mean test with unequal variances

Wei Ming Luh, Jiin Huarng Guo

研究成果: Article同行評審

13 引文 斯高帕斯(Scopus)

摘要

Yuen's two-sample trimmed mean test statistic is one of the most robust methods to apply when variances are heterogeneous. The present study develops formulas for the sample size required for the test. The formulas are applicable for the cases of unequal variances, non-normality and unequal sample sizes. Given the specified a and the power (I - β), the minimum sample size needed by the proposed formulas under various conditions is less than is given by the conventional formulas. Moreover, given a specified size of sample calculated by the proposed formulas, simulation results show that Yuen's test can achieve statistical power which is generally superior to that of the approximate t test. A numerical example is provided.

原文English
頁(從 - 到)137-146
頁數10
期刊British Journal of Mathematical and Statistical Psychology
60
發行號1
DOIs
出版狀態Published - 2007 五月

All Science Journal Classification (ASJC) codes

  • 統計與概率
  • 藝術與人文(雜項)
  • 心理學(全部)

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