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this post was submitted on 24 Jun 2025
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Science Memes
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What do the bar represent in 3d space?
What do they represent in 3d space?!? (aggressiveduck.jpg)
Gaussian distributions.
Not every error bar represents a Gaussian, if for no other reason that most error bars aren't symmetric.
The error bars for small sample size relative to population size are Gaussian.
Error due to a non-representative sample can have a variety of shapes, but their distribution might also be unknown. We do frequently, almost implicitly, assume unknown distributions to be Gaussian, but we should recognize that's not necessarily a true fact about the universe.