February, 2003
© 2000, 2001, 2003 Scott S. Emerson, M.D., Ph.D.
Two-sided level .05 test of a normal mean (1 sample)
Suppose we observe a sample mean of 0.4
Questions of interest: Based on observed sample mean
of 0.4
·What is the best estimate of treatment effect?
·What is reasonable range of estimates?
·What does this observation tell us about the null
hypothesis of a true treatment effect of 0?
·Should
we decide that the true treatment effect is not 0?