February, 2003
© 2000, 2001, 2003 Scott S. Emerson, M.D., Ph.D.
Second
choice: Probability model for response (cont.)
Consider
the distribution of outcomes for individuals receiving
intervention
·Use a
probability model to describe distribution of response
·Usually
choose a summary measure of the distribution
-e.g.. mean,
median, etc.
·Scientific
questions then expressed for values of summary measure