Fig. 2.
Treatment and factor balance with varying allocation block sizes: 3, 6, 15 and 30, treatment allocation ratio 1:2, sample sizes 30 and 120
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.