The correct answer is C. To reduce overfitting and improve model accuracy.
Random forests are a type of machine learning algorithm that is used for classification and regression tasks. They are made up of a number of decision trees, and each tree is trained on a different subset of the data. This helps to reduce overfitting, which is a problem that can occur when a model is trained on too much data. Overfitting occurs when the model learns the training data too well, and as a result, it does not generalize well to new data. Random forests help to reduce overfitting by averaging the predictions of the individual trees. This helps to reduce the impact of any individual tree that may have overfit the training data.
Random forests are also very effective at improving model accuracy. This is because they are able to capture the complex relationships between the features and the target variable. They are also able to handle noisy data and missing values.
Here is a brief explanation of each option:
- A. To perform dimensionality reduction: Dimensionality reduction is a technique that is used to reduce the number of features in a dataset. This can be useful when the dataset has a large number of features, as it can help to improve the performance of machine learning algorithms. Random forests do not perform dimensionality reduction.
- B. To perform clustering: Clustering is a technique that is used to group data points together. This can be useful for finding patterns in data and for understanding the relationships between data points. Random forests do not perform clustering.
- D. To create decision boundaries: Decision boundaries are lines that are used to separate data points into different classes. Random forests can be used to create decision boundaries, but this is not their main purpose.