196
Nonparametric Summary Measures
Nonparametric:
Estimate summary measures from nonparametric empirical distribution
functions
–E.g., use sample
median for inference about population medians
–In the presence of
censoring, use estimates based on Kaplan-Meier estimates
–Often the nonparametric
estimate agrees with a commonly used (semi)parametric
estimate
•Interpretation may
depend on sampling scheme
•In this case, the
difference will come in the computation of the standard errors