Exercise

Inspecting the model

Well done getting the model-building right! The trace is available in your workspace and, following the best practices, you will now inspect the posterior draws to see if there are any convergence issues. Next, you will extract each model parameter from the trace and summarize it with its posterior mean. These posterior means will come in handy later, when you will be making predictions with the model. Let's take a look at the parameter draws!

You will need to use pymc3 and numpy, which have been imported for you as pm and np, respectively.

NOTE: Please allow up to half a minute for the plots to render, since they have many draws to process.

Instructions 1/2

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  • Draw and examine the trace plot of posterior draws.
  • Create a summary of posterior draws, assign in to summary, and print it.