Update README.md

Author: davidemezzadri

README.md

@@ -1,2 +1,5 @@
 # bayesian_hierarchical_models
-Implementation of
+Implementation of Gibbs sampling to estimate the posterior distribution of the parameters of two different Bayesian hierarchical models (in the context of educational setting).
+- gibbs_without7.ipynb ---> model without covariates
+- gibbs_with7.ipynb ---> model with covariates
+In addition, there are basic diagnostics of the convergence of the algorithms: trace plots and auto-correlation functions.