February, 2003
© 2000, 2001, 2003 Scott S. Emerson, M.D., Ph.D.
Session 1- Fixed Sample Design: 53
Classical Hypothesis Testing
Classical Two-sided Test
Let
·q (a parameter) summarize treatment effect
·T (a statistic) tend to be large for larger q
·cL, cU critical values chosen by some criterion
Null Hypothesis:             H0: q = q0
Alternative Hypothesis:  H1: q ¹ q0
Reject H0                        ÜŞ         T £ cL or T ³ cU
Do not reject H0         ÜŞ            cL < T < cU