Practice - What is a Confusion Matrix?
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Practice Questions
Test your understanding with targeted questions
Define True Positive.
💡 Hint: Think about the examples used in emails.
What is a False Negative?
💡 Hint: Consider what happens when a spam email is missed.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What does a True Positive indicate?
💡 Hint: Consider the meaning of true versus false.
Is a False Positive a good indicator of model performance?
💡 Hint: Think of how it affects users.
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Challenge Problems
Push your limits with advanced challenges
Suppose a new spam detection model is tested on 500 emails, resulting in 200 True Positives, 50 False Positives, 100 True Negatives, and 150 False Negatives. Calculate accuracy, precision, recall, and F1 score.
💡 Hint: Make sure to use the correct formulas for each metric.
You have a dataset with 80 instances labeled positive and 20 labeled negative. The model predicts all instances as positive. Is this a good strategy? What is the confusion matrix and the derived metrics?
💡 Hint: Reflect on the implications of missing actual negative cases.
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