Question: Why is it often challenging to use system architecture changes to reduce both bias and variance at the same time?

Sample answer: It is challenging because these architectural methods are harder to identify and implement, and selecting a model architecture that is well suited for the specific task can be difficult.

Key points:

• Methods involving major architecture changes are harder to identify and implement.
• Selecting a model architecture well suited for the task is difficult.

Rubric: The student should state that the methods are harder to identify and implement, and that selecting a well-suited architecture is difficult.