Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
RDS I (black) and RDS II (gray) design effects for the overall sample, small proportion, and large proportion variables. Small proportion variables are dichotomous variables for which the population parameter is less than 0.1. Large proportion variables are those for which the population parameter is greater than 0.1.
