Machine Learning Practice, Quiz 1

September 2023 term, 29 Oct 2023, Set QPD2

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Question 1

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Select one option

• A.

  The highest score for each student.

• B.

  A list of subjects sorted by their average scores.

• C.

  The average score of each student across all subjects.

• D.

  A DataFrame with the scores of all students for each subject.

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Figure from the original question paper Figure from the original question paper You’re working with a dataset that consists of training data (‘train\_data’) and test data (‘test\_data’). The dataset contains both numerical and categorical features. You decide to employ a combination of ‘StandardScaler’ (for numerical columns) and ‘OneHotEncoder’ (for categorical columns) from ‘scikit-learn’ using the ‘ColumnTransformer’ utility. Which of the following actions is MOST likely to introduce data leakage or potential modeling issues?