February, 2003
© 2000, 2001, 2003 Scott S. Emerson, M.D., Ph.D.
Frequentist Methods 1: 68
Example
Effect of sampling distribution on estimates (cont.)
Sampling distribution summary measures for variance 26.02, max N 100
           True treatment effect: Mean = 0.400
Sampling Dist      O’Brien-
Summary Measure    Fleming    Pocock
Mean                0.380      0.372
Median              0.374      0.333
Mode                0.000      0.040
Maximal for         0.400      0.400