Case context: A plotted result uses a blue curve for training error and a red curve for dev error. The red curve lies strictly above the blue curve.

Question: Does this plot show the usual relationship described in the source, and what does it indicate about performance on the two sets?

Sample answer: Yes. The plot shows the usual relationship because the dev-error curve lies above the training-error curve. It indicates that the algorithm performs better on the training set than on the dev set.

Key points:

• The red curve represents dev error.
• The blue curve represents training error.
• Dev error lies above training error.
• The algorithm performs better on the training set.

Rubric: The response should identify the relationship as usual and correctly connect the higher dev-error curve with better performance on the training set.