Prueba de pérdida de Huber y regresión robusta

Las respuestas y explicaciones aparecen a medida que realiza el cuestionario.

1. ¿Cómo trata la pérdida de Huber un residuo mucho más allá de su umbral?
   • Its penalty grows linearly with residual magnitude
   • Its penalty becomes exactly zero
   • It squares the residual at a faster rate
   • It removes the observation automatically
2. ¿Qué comportamiento utiliza la pérdida de Huber para residuos pequeños?
   • A constant penalty
   • A quadratic penalty
   • A binary outlier label
   • No contribution to the objective
3. ¿En qué se diferencia RANSAC de la regresión de Huber en el enfoque descrito?
   • It estimates only class probabilities
   • It assigns the same squared penalty to every point
   • It seeks a consensus set from repeatedly fitted subsets
   • It removes the need to choose any threshold
4. Un residuo grande es un evento raro importante y válido. ¿Qué debería considerar el analista antes de utilizar la pérdida de Huber?
   • Whether rarity alone is enough to treat the event as a measurement error
   • Whether Huber loss will automatically relabel the observation as an inlier
   • Whether all rare observations should be removed before evaluation
   • Whether downweighting that event conflicts with the decision goal
5. ¿Por qué puede ocurrir un residuo extremo incluso cuando el registro no es erróneo?
   • Every large residual is a data-entry mistake
   • It may be a valid rare event or reflect model misspecification
   • Huber loss creates all large residuals
   • A linear predictor cannot have residuals
6. When should a robust threshold be selected?
   • Tune repeatedly on final-test errors because they best represent deployment
   • Choose the threshold that minimizes training loss, then report that same training score
   • Select it using training or validation data while reserving the final test set
   • Use the library default without checking whether it suits the residual scale
7. Which feature can remain a concern for robust regression despite reduced sensitivity to large response residuals?
   • Only whether the average response residual is zero
   • Only whether the residual histogram has a symmetric center
   • Only whether the response variable was standardized
   • Whether unusual predictor-space leverage can still affect the fit
8. Why report tail performance when extreme errors matter operationally?
   • A robust objective may deemphasize cases that dominate operational tail risk
   • Huber loss assigns every extreme observation exactly zero influence
   • Training loss alone measures accuracy on unseen extreme outcomes
   • The average residual identifies the size of every tail error