If Mean Squared Error = Variance + Bias^2. Then How can the Mean Squared Error be lower than the Variance – stats.stackexchange.com

If Mean Squared Error = Variance + Bias^2. Then How can the Mean Squared Error be lower than the Variance – stats.stackexchange.com

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I was reading the Introduction to Statistical Learning. Here it is shown that:- In a later example, the train and test MSE are plotted. I wanted to know if both the bias^2 and variance are positive ...

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