February, 2003
© 2000, 2001 Scott S. Emerson, M.D., Ph.D.
Example:
Superposed stopping rules from first and second interim analyses using
unified family
Because the
monitoring bounds were constrained on the sample mean scale, the
stopping boundaries computed for the first analysis agree at
both analyses when plotted on the sample mean scale
If the
boundaries were plotted on some other scale, they would not agree