5.2 Validation Error Rate Varies Depending on Data Set

Left: The validation set approach was used to estimated the test mean squared error from predicting mpg as a polynomial function of horsepower. Right: The estimated test error varies depending on the validation and training sets used.

Figure 5.2: Left: The validation set approach was used to estimated the test mean squared error from predicting mpg as a polynomial function of horsepower. Right: The estimated test error varies depending on the validation and training sets used.