ezoic

Monday, January 18, 2021

what are bias and variance?

 bias and variance, basic definitions:


bias : it is the difference between average predictions and true values

variance: it is teh variability of our predictions, i.e. how spread out your model predictions are. 


https://www.cs.upc.edu/~belanche/Docencia/dm2/MATERIAL/1.%20ParamEst%20-%20Bias%20&%20Var/DMII-Class1.pdf


underfitting - high bias and low variance

overfitting - high variance and low bias 

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