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2012 Jun 05
0
How to compute boundaries for bivariate normal distribution in group sequential design
Hi all Dear all, I need to compute boundaries for 3 stages group sequential design with 2 variables using Simpson?s integration method. There is a r program written by Michael A. Proschant et Al. (2006) (Statistical Monitoring of Clinical Trials: A Unified Approach) ? see file attached ? to calculate boundaries for 1 variable only. Does anyone know how this program can be modified to incorporate a second variable? Or propose an alternative solution please? Many thanks Jeka http:...