Yo Achim! On Tue, 07 Feb 2017 20:56:36 +0100 Achim Gratz <strom...@nexgo.de> wrote:
> Hal Murray writes: > > Looks like we are getting into the old precision vs accuracy tangle. > > Do we have a glossary with useful descriptions? > > That slot should represent the number of useful bits. > > It really doesn't help that precision, accuracy and resolution have a > number of different meanings depending on the context. It is doubly > unfortunate that NTP necessarily uses several of these contexts. +1 > In measurement statistics, precision describes the variability of the > distribution of many repeated measurements of the same quantity and > accuracy the deviation of the location parameter on that statistic to > the "ground truth" (or more commonly to another measurement that ius > known to have higher precision and accuracy). It is generally assumed > that the measurement process has much higher resolution than the > precision of the measurement and the measurement distribution can be > assumed to be continous. Resolution in this context is the smallest > change in the measured quantity that will yield a discernible change > of the measured value. I think you are assuming way too much. For example, on the RasPi the resolution is worse than the accurcay of the GPS. RGDS GARY --------------------------------------------------------------------------- Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703 g...@rellim.com Tel:+1 541 382 8588 Veritas liberabit vos. -- Quid est veritas? "If you can’t measure it, you can’t improve it." - Lord Kelvin
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