[Gradebook] Domain 3 Lesson 4

What are KPIs?

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What is the purpose of a confusion matrix?

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True Positives / (True Positives + False Negatives)

• Precision
• Recall
• Accuracy
• F1 Score

True Positives / (True Positives + False Positives)

• Precision
• Recall
• Accuracy
• F1 Score

2 x Precision x Recall / Precision + Recall

• Precision
• Recall
• Accuracy
• F1 Score

(True Positives + True Negatives) / Total Predictions

• Precision
• Recall
• Accuracy
• F1 Score

A confusion matrix with a high accuracy percentage but a very low number of true positives or negatives is just as reliable as one with a slightly lower accuracy percentage but a healthy number of true positives and true negatives.

• True
• False

What three things must be done with new data before testing it?

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Why is it important to document all the steps to prepare new test data?

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Why should one document and communicate changes to important stakeholders?

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