1. The Importance of Data Visualization and Data Exploration

Overview

This chapter introduces you to the basics of the statistical analysis of a dataset. We will look at basic operations for calculating the mean, median, and variance of different datasets and use NumPy and pandas to filter, sort, and shape the datasets to our requirements. The concepts we will cover will serve as a base of knowledge for the upcoming visualization chapters, in which we will work with real-world datasets. By the end of this chapter, you will be able to explain the importance of data visualization and calculate basic statistical values (such as median, mean, and variance), and use NumPy and pandas for data wrangling.