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Understanding Train-Test Split

Understanding Train-Test Split

A common mistake in machine learning is evaluating a model using the same data that was used for training.

If this happens, the model may appear highly accurate even though it cannot perform well on new data.

To solve this problem, the dataset is divided into:

Training Data

Used to teach the model.

The algorithm learns patterns and relationships from this portion.

Testing Data

Used only for evaluation.

The model has never seen this data before.

Testing data provides a realistic estimate of how the model will perform in real-world situations.