This paper studies the effect of the normal distribution assumption on the power and size of the sign test, Wilcoxon's signed rank test and the t-test when used in one-sample location problems. Power functions for these tests under various skewness and kurtosis conditions are produced for several sample sizes from simulated data using the g-and-k distribution of MacGillivray and Cannon . Copyright© 2004, Lawrence Erlbaum Associates, Inc.
McDougal, M. K., & Rayner, G. D. (2004). Robustness to non-normality of various tests for the one-sample location problem. Journal of Applied Mathematics and Decision Sciences, 8(4), 235–246. https://doi.org/10.1155/s117391260400015x