R2 Score & Mean Square Error (MSE) Explained

Mean Squared Error: Definition and Example

SOLVED: In this exercise, we want to understand a little better the formula for the mean squared error by considering two alternative scenarios. In the first scenario, O   N(0,1) and we observe X = O W, where W   N(0,1) is independent of O. In the second scenario, the prior information on O is extremely inaccurate: O   N(0,∞), where ∞ is so large that it can be treated as infinite. But in this second scenario, we obtain two observations of the form Xi = 6 W, where the W's are standard no

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RMSE: Root Mean Square Error

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