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Decision Analytic Thinking: Whats a Good Model? (Evaluating Classifiers…
Decision Analytic Thinking: Whats a Good Model?
Evaluating Classifiers
Classification accuracy
Simplistic
Not applicable to real world business
Confusion Matrix
False Negatives
True Positives
True Negative
False Positive
Unequal Costs and Benefits
False Negatives
False Positives
What is the goal of the application?
Does the data correspond to the goal
Expected Value
Weight of occurrence
Heavy Weight = more value
Light Weight = less value
Error Rates
Tallies in confusion matrix