20.1. Factors That Can Affect Model Performance# 20.1.1. Type III Errors# 20.1.2. Measurement Error in the Outcome# 20.1.3. Measurement Error in the Predictors# 20.1.4. Discretizing Continuous Outcomes# 20.1.5. When Should You Trust Your Model’s Prediction?# 20.1.6. The Impact of a Large Sample# 20.1.7. Computing# 20.1.8. Exercises#