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Variable Selection
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Variable Selection
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Now · 7.1 Selection Criteria
Variable Selection
7.1 Selection Criteria
| Criterion | Formula | Lower is |
|---|---|---|
| Cp (Mallows) | Cp=σ^2SSres(p)−n+2p | Better (close to p ) |
| AIC | −2ln(L)+2p | Better |
| BIC | −2ln(L)+pln(n) | Better (penalizes complexity more) |
| Adjusted R2 | 1−SStot/(n−1)SSres/(n−p) | Higher is better |
7.2 Selection Methods
- Forward selection: Start empty, add variables one by one
- Backward elimination: Start full, remove least significant
- Stepwise: Both forward and backward Join Discord PreviousTransformationsNextGeneralized Linear Models