Description: Variance Reduction Techniques are methods used in data preprocessing to decrease variability in a dataset, thereby improving the accuracy and generalization of machine learning models. Variance refers to a model’s sensitivity to fluctuations in training data; a model with high variance may overfit the data, capturing noise instead of meaningful patterns. These techniques aim to balance bias and variance, allowing the model to learn more effectively. Common techniques include regularization, which penalizes model complexity; the use of ensemble methods, such as bagging and boosting, which combine multiple models to enhance stability; and dimensionality reduction, which simplifies the dataset while retaining the most relevant features. Implementing these techniques is crucial in developing robust models, especially in contexts where data is limited or noisy, as it helps prevent overfitting and improves the model’s predictive capability on unseen data.
