E4. To be completed after lesson 14

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Exercise 4.1

Why are prior predictive checks useful and important?

Exercise 4.2

I contend that plotting the “best fit line” is not a sufficient graphical model assessment. I further contend that graphical posterior predictive checks are better. Do you agree? Why or why not?

Exercise 4.3

If a model’s posterior predictive checks check out, does it mean the model is a good generative model?

Exercise 4.4

Did you read the solutions to homework 3?

Exercise 4.5

Write down any questions you may have.