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
Exercise instructions
- Calculate the posterior predicted scores for
stan_model - Print a summary of the observed popularity scores in the
songsdata - 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[___,])