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.
Sampling distributions for each level of δ. The vertical dotted line indicates the average value for the group. The panels show heterogeneous nonnormal populations in which some proportion of the participants exhibit an interaction and some proportion do not. The proportion progressively increases from top to bottom
