Statistics in Biopharmaceutical Research | 2019
“Exact and approximate power and sample size calculations for analysis of covariance in randomized clinical trials with or without stratification” by Yongqiang Tang
Abstract
AbstractTang derived the exact power formulas for t tests and analysis of covariance (ANCOVA) in superiority, noninferiority (NI), and equivalence trials. The power calculation in equivalence trial...