[ntp:questions] Re: calculating mean PPM value

David L. Mills mills at udel.edu
Sat Sep 20 19:35:46 UTC 2003


What you see is what you get. The data represent the frequency offset as
measured by ntpd on the machine in test. Remember, the only way to see
these data remotely is via the ntpq program.


Drk Ryan wrote:
> 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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