As an alternative to cross-validation in this problem, use the fitted model based on the construction set to obtain predictions and the standard error of prediction XXXXXXXXXXfor each of the rows in...

As an alternative to cross-validation in this problem, use the fitted model based on the construction set to obtain predictions and the standard error of prediction (2.17) for each of the rows in the validation set. Then compute the average squared prediction error and its square root. Compare with the results of the last sub problem.