Short Answer

Explain the naming origin of the data mismatch problem.

Question: Why is the term 'data mismatch' specifically chosen to describe the problem where an algorithm generalizes well to the training distribution but poorly to the dev/test distribution?

Sample answer: The problem is called data mismatch because the training set data is a poor match for the dev/test set data.

Key points:

  • The training set data is a poor match for the dev/test set data.

Rubric: The response must state that the name arises because the training set data is a poor match for the dev/test set data.

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Updated 2026-05-27

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