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Determine the lowest possible F1 score and the mathematical conditions that cause it.
Question: Based on its definition as the harmonic mean of precision and recall, what is the lowest possible value for an F1 score, and under what specific condition does it achieve this value?
Sample answer: The lowest possible value for the F1 score is 0. This occurs when either the precision or the recall of the classification test is exactly zero.
Key points:
- The lowest possible value is 0.
- This occurs if either the precision or the recall is zero.
Rubric: The answer must accurately state that the lowest value is 0 and explain that this happens if precision or recall is zero.
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Data Science
Machine Learning
Deep Learning
Supervised Learning
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Machine Learning Yearning @ DeepLearning.AI
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