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.
The cumulative number of designed back-offs is displayed in clusters with a width of 0.2 s back-off time. The boxplot displays median, quartiles, whiskers and 95% confidence intervals. The number of measurements is N = 478.
