Check the R markdown files:
This is a tutorial on making histograms in Stata for beginners.
Here you will find a small demostration of the two-fold pooled Oaxaca-Blinder decomposition.
This is a short introduction to how to make trendlines (using means).
Here you can find a tutorial for performing chi-squared test in Stata with interpretation.
This is a small tutorial on how to perform the gamma test with ordinal variables in Stata and its interpretation.
How to perform t-test using Stata