You Started Working on a Classification Problem with Time Series

question 22

Multiple Choice

You started working on a classification problem with time series data and achieved an area under the receiver operating characteristic curve (AUC ROC) value of 99% for training data after just a few experiments. You haven't explored using any sophisticated algorithms or spent any time on hyperparameter tuning. What should your next step be to identify and fix the problem?

• A) Address the model overfitting by using a less complex algorithm.
• B) Address data leakage by applying nested cross-validation during model training.
• C) Address data leakage by removing features highly correlated with the target value.
• D) Address the model overfitting by tuning the hyperparameters to reduce the AUC ROC value.

---

Definitions:

Tax Returns

Official documents submitted to tax authorities declaring income, expenses, and pertinent information to calculate tax liability.

International Trade Union Confederation

An international organization aimed at promoting the interests of workers globally through international cooperation and advocacy.

Equality at Work

The principle that all individuals have the right to be treated fairly in the workplace, without discrimination on the basis of characteristics like gender, race, or disability.

Uruguay

A country located in the southeastern region of South America, known for its verdant interior and beach-lined coast.