Final answer:
Splitting the dataset into testing and training sets allows for model evaluation and avoids overfitting or underfitting. It also ensures a diverse range of samples for training while reserving data for evaluation.
Step-by-step explanation:
The purpose of splitting the dataset into testing and training sets is to evaluate the performance of a trained model on new, unseen data. By splitting the data, we can assess how well the model generalizes to real-world scenarios. This helps us understand if the model is overfitting or underfitting.
Additionally, splitting the dataset allows us to train the model on a subset of the data while reserving a separate portion for evaluation. This ensures that the model learns patterns from a diverse range of samples and is not biased towards specific data points.