February, 2003
© 2001, 2003 Scott S. Emerson M.D., Ph.D.
 Nonparametric Models: 13
The Problem
Conditions under which an intervention might be expected to affect many aspects of a probability distribution
Example 1: Cell proliferation in cancer prevention
·Within subject distribution of outcome is skewed (cancer is a focal disease)
·Such skewed measurements are only observed in a subset of the subjects
·The intervention affects only hyperproliferation (our ideal)