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Apr 2, 2014 at 16:30 history edited Mark Rovetta CC BY-SA 3.0
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Apr 1, 2014 at 20:03 comment added user6972 @SebastianHenckel it's called bias because it averages out to some bias, not zero.
Apr 1, 2014 at 16:12 comment added Mark Rovetta What if everyone had a different measuring rule manufactured in the same factory - and made of green wood - which shrank 0.1% over time? The inaccuracies would not average out.
Apr 1, 2014 at 16:01 comment added George G Would it? What if there's a systematic bias that most humans share?
Apr 1, 2014 at 15:40 comment added yippy_yay The "measuring rule" is different with every respondent - their best estimate. So the bias would even out.
Mar 30, 2014 at 18:10 history answered Mark Rovetta CC BY-SA 3.0