# Summary

In this chapter, we learned about the first steps toward performing any kind of statistical analysis: first, we defined our business problem and introduced the dataset. Based on the problem we wanted to solve, we prepared the dataset accordingly: we deleted some records, imputed missing values, transformed the types of some variables, and created new ones. Then we learned about the need for descriptive statistics; we learned how easy it is to calculate them using pandas and how to use and interpret those calculations. In the final section, we learned about how we can combine visualizations with descriptive statistics to get a deeper understanding of the relationships between variables in our datasets. What we learned in this chapter are concepts and techniques that you will be able to put in practice in any data analysis you perform. However, to get more sophisticated in your analysis, you need to have a good grasp of the basics of probability theory, which is the subject of...