A simulation study was conducted to explore the performance of the independent means t-test, Satterthwaite’s approximate t-test, and the conditional t-test under various conditions. This study analyzed Type I error control and statistical power of these testing approaches and provided guidance on the proper selection among them.
Nguyen, Diep T.; Kim, Eun Sook; Rodriguez de Gil, Patricia; Kellermann, Anh; Chen, Yi-Hsin; Kromrey, Jeffrey D.; and Bellara, Aarti
"Parametric Tests for Two Population Means under Normal and Non-Normal Distributions,"
Journal of Modern Applied Statistical Methods: Vol. 15
, Article 9.
Available at: http://digitalcommons.wayne.edu/jmasm/vol15/iss1/9