517. Implementation of an RCT (9 steps) with associated potential weaknesses October 25th, 2008 by reuben in EBM Back Top Tags: card 516. What is the purpose of randomization? What is stratified randomization, and its purpose? What is a confounding factor? What is publication bias? What is type I error, type II error, alpha, beta? 518. What is the p value / Define trial power / What is the Bonferonni correction? Leave a Reply Cancel reply Please post any discussion to the emupdates Reddit page.