February, 2003
© 2000, 2001  Scott S. Emerson, M.D., Ph.D.
Session 2: 54
Stopping Rules
One-sided tests of lesser hypotheses
Always have ‘b’ and ‘c’ boundaries are equal
·so no early stopping for intermediate Tn
·
Early stopping
· If ‘a’ boundary at  -¥: no early stopping for alternative
· If ‘d’ boundary at  ¥: no early stopping for null