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:

Individual Earnings

The amount of money earned by an individual from work or investments.

Mean

The arithmetic average of a set of values, calculated by adding all the numbers and dividing by the count of values.

Central Tendency

A statistical measure that identifies a single value as representative of an entire dataset, commonly reflected through the mean, median, or mode.

Standard Deviation

A statistical measure of the dispersion or variability in a data set, indicating how spread out the data points are from the mean.