[ntp:questions] calculating mean PPM value

Drk Ryan ryandrk at hotmail.com
Fri Sep 19 18:10:04 UTC 2003

In Dr. Mills 1997 survey of 20,000 Internet hosts, the mean frequency
error was found to be 78 PPM. When calculating this value do you add
the |absolute| frequency errors or is it necessary to look at the +,-
signs involved?

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