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Case Study

Determine the correct data partition for tuning a model's parameters and features.

Case context: An engineering team is building a predictive algorithm. They have a full dataset and need to decide which data columns to use as inputs (features) and what specific configuration settings to apply to their algorithm (parameters).

Question: Which specific data partition should the team evaluate their algorithm on to make these choices, and what is another name for this partition?

Sample answer: The team should use the development set, which is also sometimes called the hold-out cross validation set, to tune their parameters and select their features.

Key points:

  • Identifies the development set as the correct partition.
  • Provides the alternative name: hold-out cross validation set.
  • Connects the team's need to select features and tune parameters directly to the dev set's stated purpose.

Rubric: The answer should correctly identify the development set and its alternative name as the proper tool for the team's parameter and feature selection tasks.

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Updated 2026-05-27

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