Exploratory Data Analysis

Notice how on the Ansombe dataset, the mean, standard deviation and correlation between x and y are almost identical. When we learn about linear regression, we will also see the same coefficients for linear regression as well. In addition to summary statistics, visualizations can be used to explore and describe data. We will learn in the tutorials the importance of visualizations, and that it is not enough to use simple statistical properties to describe data. This is demonstrated by Anscombe's quartet as outlined in this article Why Data Visualizations (are important).