Supplementary materials [code] to: The a priori procedure for estimating the mean in both log-normal and gamma populations and robustness for assumption violations

Supplementary materials [code] to: Cao, L., Tong, T., Trafimow, D., Wang, T., & Chen, X. (2022). The a priori procedure for estimating the mean in both log-normal and gamma populations and robustness for assumption violations. Methodology, 18(1), 24–43. https://doi.org/10.5964/meth.7321 Supplementary materials include three parts. The first one is the R-code for the link of required sample size for Gamma distribution. The second one is the R-code for the link of required sample size for log-normal distribution. The third one is the R-code for simulations and real data analysis.