**A misplacement in judgment or a systems output in a consistent direction** Like [[Noise]], bias contributes to error (see [[Reducing Noise and Reducing Bias]]). Unlike noise, bias doesn't do so _randomly_. Humans are biased. Systems can be biased. Bias is a clinical, technical, and societal term and in every sense it means a deviation from correctness in a consistent manner.  # Mathematical Bias The term 'bias' is also used in statistics and machine learning to refer to a constant that's added to a curve-fitting function that is independent of the inputs. The `B_0` term of [[Linear Regression]]s, for example. **** # More ## Source - [[Noise - A Flaw in Human Judgment]] ## Related - [[Noise]] - [[Bias Index]]