What is the main objective of the Ensemble Node in SAS Enterprise Miner?

The main objective of the Ensemble Node in SAS Enterprise Miner is to combine predictions from multiple models. Ensemble modeling leverages the strengths of several models to improve overall prediction accuracy and robustness. By aggregating the outputs of different models, the Ensemble Node can help mitigate individual model errors and capture a more comprehensive view of the data.

This process can include techniques such as bagging, boosting, or stacking, each of which blends model predictions in a way that enhances predictive performance. The rationale behind this approach is that different models might capture different aspects of the data, and by bringing their predictions together, the ensemble can provide a better final prediction than any single model could achieve on its own.

In this context, the other options discuss aspects that are not the primary focus of the Ensemble Node. While reducing the number of models, optimizing single model performance, and eliminating bias are important concepts in machine learning, the key feature of the Ensemble Node is its ability to integrate the predictions from various models rather than modifying them individually or focusing on just one.