What technique can be used to improve the accuracy of a predictive model?

Increasing the size and diversity of the training dataset is a proven method for enhancing the accuracy of a predictive model. A larger and more varied dataset provides the model with more information about the underlying patterns and relationships within the data. This allows the model to learn from a broader range of scenarios, leading to better generalization when it encounters new, unseen data.

A more extensive dataset also helps to reduce overfitting, where the model might perform well on the training data but poorly on new data. By including diverse data points, the model is less likely to be skewed by outliers or specific patterns that do not apply universally. Overall, a richer training dataset equips the model with a more comprehensive understanding, which significantly boosts predictive performance.