Biometrika 1986 73(3):759-760; doi:10.1093/biomet/73.3.759
© 1986 by Biometrika Trust
Approximation of discrete sequential boundaries
P. BAUER
Institute of Medical Statistics, University of Vienna Vienna A-1090, Austria
Conservative critical limits for discrete sequential boundaries are derived, when the number of decision times and group sizes are not fixed in advance. The method at any stage of the sequential experiment requires only the joint distribution of the test statistics at the last two inspection times.
Key Words: Decision time Group Sequential design

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