Figure 3.
The design-effect (deffwt) of weighted estimate. Here wi is the weight (inverse of selection/participation probability) in the i-th stratum.
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.