revised case study

Author: mitzimorris

jupyter/sum-to-zero/README.md

@@ -3,6 +3,13 @@ introduced in Stan 2.36.
 
 HTML page has all necessary resources.  To rebuild,  add `stan-dev/quarto-config` submodule.
 
+Included in the GitHub repository for this notebook are several python files of helper functions.
+
+* utils\_html.py - format Stan summaries for this notebook.
+* utils\_dataviz.py - summarize and plot the posterior sample.
+* utils\_bym2.py - compute data inputs to the BYM2 model.
+* utils\_nyc\_map.py - munge the New York City census tract map.
+
 Author:  Mitzi Morris