There are several powerful statistical analysis software, such as Stata, SAS, and a host of other packages with different levels of elegance, completeness, and support. Preferred is Stata because of its extensive contributions from its users and reliable technical support. I will add Stata commands to perform all the examples of the book. The commands are simple and quick to run. I will provide an appendix with the list of the commands used in the manuscript, their syntax, and a brief description of the output they create.

Updated data for all the examples using the most recent available data. Provide the solutions in Excel and Stata and explain the meanings of the output to reinforce the subject and allow users to have another set of examples using another real-life data. Increased graphical representations to reinforce and clarify the concept.