Comparing the “Typical Score” Across Independent Groups Based on Different Criteria for Trimming

• Main Authors: Syed Yahaya, S.S., Othman, Prof.Madya Abdul Rahman, Keselman, H. J.
• Format: Article
• Language: English
• Published: 2006
• Subjects: LC5800-5808 Distance education.
• Online Access: http://eprints.usm.my/3115/1/Comparing_the_%E2%80%9CTypical_Score%E2%80%9D_Across_Independent_Groups_Base.pdf; http://eprints.usm.my/3115/
• Institution: Universiti Sains Malaysia

Nonnormality and variance heterogeneity affect the validity of the traditional tests for treatment group equality (e.g. ANOVA F-test and t-test), particularly when group sizes are unequal. Adopting trimmed means instead of the usual least squares estimator has been shown to be mostly affective in c...