I learned basic data analysis techniques by studying the relationship between demographics and political opinion poll responses. As an undergraduate in a graduate Political Science course at Ohio State University I used 80 column punch cards (send me an email if you don't know what that means) to instruct an IBM mainframe computer to crosstabulate age, sex, income, and race data with voting behavior and political opinions.
Now you can do the same stuff online with little more than an Internet connection and a browser.