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Predicted score distributions

Now let's practicing using posterior predictive scores to look at how our Spotify model fits to the real data.

This exercise is part of the course

Bayesian Regression Modeling with rstanarm

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Exercise instructions

  • Calculate the posterior predicted scores for stan_model
  • Print a summary of the observed popularity scores in the songs data
  • Compare this to a summary of the 1st and 10th replications

Hands-on interactive exercise

Have a go at this exercise by completing this sample code.

# Calculate posterior predictive scores
predictions <- ___(stan_model)

# Print a summary of the observed data
summary(songs$___)

# Print a summary of the 1st replication
summary(predictions[___,])

# Print a summary of the 10th replication
summary(predictions[___,])
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