Fig. 2From: Sample size determination for a binary response in a superiority clinical trial using a hybrid classical and Bayesian procedureConditional joint prior density p(π 1)p(π 2|π 2>π 1) for π 1∼Beta(6.62,14.11) and π 2∼Beta(14.11,6.62). a Highlighting region where power <80% under a traditional design. b Highlighting region where power <80% under a CEP designBack to article page