Machine Learning, Programming, Data Science, Statistics, Technology.
observations {(x_1,y_1),(x_2,y_2),…,(x_n,y_n)} and we obtain the estimate f^t (f_hat). We can then compute f^(x_1),f^(x_2),…,f^(x_n). If these are approximately equal to y_1,y_2,…,y_n, then the training error rate (e.g. MSE) would be small. However, we are really not interested in whether f(x_k) ≈