3. Model-agnostic methods# 3.1. Conditional Feature Importance 3.1.1. Theoretical index 3.1.2. Estimation procedure 3.1.3. Inference 3.1.4. Regression example 3.1.5. Classification example 3.1.6. References 3.2. Permutation Feature Importance 3.2.1. Theoretical index 3.2.2. Estimation procedure 3.2.3. Inference 3.2.4. Regression example 3.2.5. Classification example 3.2.6. References 3.3. Shapley Additive Global Explanation (SAGE) 3.3.1. Theoretical index 3.3.2. Estimation procedure 3.3.3. Regression example 3.3.4. Classification example 3.3.5. References 3.4. Leave-One-Covariate-Out