Hyerang Park

Type I Error and Statistical Power of Welch’s t-Test Under Multiple Assumption Violations

This study employed Monte Carlo simulations to examine the effects of nonnormality, heteroscedasticity, total sample size, and unequal group sample sizes on the Type I error rate and statistical power of Welch’s t-test. The results showed that, consistent with previous studies, Welch’s t-test maintained stable control...