Description: Resampling techniques are methods used to create new samples from existing data to improve model performance. These techniques are fundamental in data preprocessing, especially in the context of statistics and machine learning. Their main goal is to address issues such as overfitting and variability in predictive model results. By generating multiple subsets of data from an original dataset, a more robust evaluation of the model’s ability to generalize to new data is allowed. Among the most common techniques are cross-validation, bootstrapping, and stratified sampling. Cross-validation involves splitting the dataset into several parts, training the model on some of them, and validating it on others, which helps obtain a more accurate estimate of the model’s performance. Bootstrapping, on the other hand, consists of taking random samples with replacement from the original dataset, allowing for the estimation of the variability of a statistic. These techniques not only improve the reliability of models but are also essential for feature selection and hyperparameter optimization, thus contributing to the creation of more robust and accurate models.
