Hi Erik,

If the mean is a straightforward average of the 600 per-second samples (at 23:10:00, 23:10:01, .... 23:19:59), then this most accurately represents (according to the "Midpoint Rule") a mean for the period extending from 23:09:59.5 to 23:19:59.5, so those should be your bounds.

cheers,
Karl



On 3/27/18 12:41 PM, Erik Quaeghebeur wrote:
I think we've been thinking about this wrong.  You apparently want to report the mean for the period 23:10:00 - 23:20:00 from 1-second samples (sampled on the second). […] So,  your bounds should define the interval represented by the mean you are reporting (23:10:00 - 23:20:00), and you should estimate that mean using 601 samples, but weighting the first and last sample half as much as the others.

I do not compute the average and neither can I influence that. Each statistic is based on 600 samples. Either 23:10:00 to 23:19:59, labeled 23:10, or 23:10:01 to 23:20:00, labeled 23:20. So either closed-open or open-closed if you would use 23:10 and 23:20 as bounds.


Best,

Erik


_______________________________________________
CF-metadata mailing list
[email protected]
http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata

Reply via email to