The two-sample trimmed t for unequal population variances
- 1 April 1974
- journal article
- research article
- Published by Oxford University Press (OUP) in Biometrika
- Vol. 61 (1) , 165-170
- https://doi.org/10.1093/biomet/61.1.165
Abstract
The effect of nonnormality on the Weleh approximate degrees of freedom t test is demonstrated. A two-sample trimmed t statistic for unequal population variances is proposed and its performance is also evaluated in comparison to the Welch t test under normality and under long-tailed distributions. If the underlying distributions is long-tailed or contaminated with outliers, the trimmed t is strongly recommended.Keywords
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