[image] Can’t find the episode where @Jonathan was explaining it but that just came up in my lecture and I thought I would share it - feel free to merge

[image] Music During Training, Eating in a Fast Race, Carb Loading and More – Ask a Cycling Coach 244 Ask a Cycling Coach Podcast Here is a commonly referenced example of the Accuracy / Precision discussion: [image]

I use a figure like this when I talk about this topic at work (you would be surprised at what levels of decision making people still have trouble understanding these concepts). What I always add as well is the idea that the target in the background represents the “truth”. If you don’t know the “tr…

Personally I’d prefer precise output of a power meter over accurate output. As you mentioned w/o being able to see the underlying data you can’t differentiate the ‘accurate but not precise’ and ‘neither accurate or precise’ anyhow. Either of the precise scenarios gives data that I can track perfor…

If you’re precise, why can’t you just adjust to become accurate? Not sure you can claim to be precise if you’re not accurate in a mechanical / electronic system.

In theory you can do just that but many things have very non-linear or otherwise difficult or non-deterministic relationships. Precise at point A may not necessarily as precise at Point B.

Because you don’t know what the real answer is. Some PMs do adjust for that though (like when you do your 0 offset) and move it to be more accurate. But without doing an actual calibration test on each unit, you have no idea if it’s drifter 3-4 Watts up or 3-4 Watts down.

My analytical chemistry professor in school used the same chart, but with a set of beer pong cups. I still remember it, so he definitely knew his audience :sweat_smile: @jmmetsar is on the money, I’m a manufacturing engineer and deal with this constantly. Every measurement is just an estimation of …

[image] AndyGajda: Where does consistency fit? In general, consistency (as we perceive that quality) = precision. Multiple measures under similar conditions give results that exhibit a small spread.

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Accuracy vs. Precision

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onemanpeloton March 3, 2020, 10:45am 3

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Accuracy vs. Precision

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