j...@math.brown.edu wrote:
I understand from
https://github.com/cosmologicon/pywat/pull/40#discussion_r219962259
that "to always round up... can theoretically skew the data"
*Very* theoretically. If the number is even a whisker bigger than
2.5 it's going to get rounded up regardless:
>>> round(2.500000000000001)
3
That difference is on the order of the error you expect from
representing decimal fractions in binary, so I would be surprised
if anyone can actually measure this bias in a real application.
It is a common knowledge that rounding half-to-even is what users want in most
cases
I don't think that's common knowledge; seems like citation needed?
It's not common enough for me to have heard of it before.
(BTW, how do you provide a citation for "common knowledge"?-)
--
Greg
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