Typical projects usually fall under these four categories:
But there are also exceptions! It's important that you take the time and think about the specific goal for your project.
This documentary demonstrates the use of a statistical method called Principle Component Analysis (this can be done in R-stylo) to look at the possibly misattributed authorship of some key medieval texts.
This recent project uses R-stylo to perform a "rolling.classify" analysis on Harper Lee's new novel, Go Set A Watchman. This kind of analysis is used on collaborations or co-authored works. The goal was to see how much Truman Capote influenced Lee's novel.