ABSTRACT
In this chapter, we are going to discuss the so-called conditional error func-
tion method (CEFM), used mainly for two-stage designs. Researchers of
this method include Proschan and Hunsberger (1995), Liu and Chi (2001),
Mu¨ller and Scha¨fer (2001), and Denne (2001), among others. We will use
the conditional error function method to easily derive the stopping bound-
ary formulations for two general p-value combination methods.
