[Gradebook] Domain 3 Lesson 4

What are KPIs?

What is the purpose of a confusion matrix?

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?

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

Why should one document and communicate changes to important stakeholders?