A Data Scientist Is Developing a Machine Learning Model to Classify

question 132

Multiple Choice

A Data Scientist is developing a machine learning model to classify whether a financial transaction is fraudulent. The labeled data available for training consists of 100,000 non-fraudulent observations and 1,000 fraudulent observations. The Data Scientist applies the XGBoost algorithm to the data, resulting in the following confusion matrix when the trained model is applied to a previously unseen validation dataset. The accuracy of the model is 99.1%, but the Data Scientist has been asked to reduce the number of false negatives. Which combination of steps should the Data Scientist take to reduce the number of false positive predictions by the model? (Choose two.)

• A) Change the XGBoost eval_metric parameter to optimize based on rmse instead of error.
• B) Increase the XGBoost scale_pos_weight parameter to adjust the balance of positive and negative weights.
• C) Increase the XGBoost max_depth parameter because the model is currently underfitting the data.
• D) Change the XGBoost eval_metric parameter to optimize based on AUC instead of error.
• E) Decrease the XGBoost max_depth parameter because the model is currently overfitting the data.

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Definitions:

Economic Development

The process by which the economic well-being and quality of life of a nation, region, or local community are improved according to specific goals and objectives.

Poverty

A condition where a person or community lacks the financial resources and essentials for a minimum standard of living.

Population Growth

A growth in the population size over a designated time frame.

Death Rates

An index reflecting the total number of fatalities within a specific group, adjusted for its size, over a given period.