Exploratory Data Analysis

This module note provides an overview of exploratory data analysis for an introduction to data science course. It begins by defining the term "data", and then describes the different types of data that companies work with (structured v. unstructured, categorical v. numeric, etc.). Next, the note describes the basic summary statistics that firms use to track key business outcomes. Finally, the note provides an overview of different visualizations. An appendix is provided, which includes the R code for creating all of the figures and visualizations shown in the note.