Microsoft Azure AI Fundamentals (AI-900) Practice Exam

Which metric can be utilized to evaluate the performance of a classification model?

1. Mean Squared Error

2. True positive rate

3. R-squared Value

4. Precision-Recall Curve

The correct answer is: True positive rate

The true positive rate, also known as sensitivity or recall, is a vital metric for evaluating the performance of a classification model. It quantifies the proportion of actual positive cases that are correctly identified by the model. A high true positive rate indicates that the model is effective at identifying positive instances, which is crucial in scenarios where it’s important to minimize false negatives, such as in medical diagnoses or fraud detection. In classification tasks, it’s essential to assess not just the accuracy of the predictions but also how well the model distinguishes between different classes. The true positive rate plays a significant role in this by helping you understand how many of the actual positive cases your model is successfully capturing. This metric, along with others like precision, F1 score, and accuracy, provides a comprehensive view of the model's performance. While the precision-recall curve is also relevant in evaluating classification models, it represents a graphical representation of the trade-off between precision and recall, rather than a single metric. Therefore, although it is a useful tool, the true positive rate is a more direct measure of performance for individual classification tasks.