Question: H3. Now apply bagging to the training set. What is the test set MSE for this approach? Below is the code that failed to work:

H3.

Now apply bagging to the training set. What is the test set MSE for this approach? Below is the code that failed to work: ```{r} bag_model <- train(training_onehot, training[,20], method = 'treebag', trControl = trControl) postResample(predict(bag_model, testing_onehot), testing$logSalary) ```

Please advise

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