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.
Categories meaning is the following: ‘Close’, both cones of the pair remained closed; ‘Positive’, the detached cone opened earlier; ‘Negative’, the attached cone opened earlier; ‘Open’, both cones opened between observations. Numbers in the bars correspond to the significance of McNemar’s test.
