Apply a three-group discrete mixture model to the baseball average data. A two group mixture, with code

Question:

Apply a three-group discrete mixture model to the baseball average data. A two group mixture, with code as below, gives an LPML (for the original data) of -726.5 , with plots of $p_{\text {new }}$ suggesting some bimodality - though the posterior predictive criterion regarding maximum $p_{\text {new }}$ is still approaching 0.9 .

image text in transcribed