Look at your data

Anscombe (1973)

Possibly one of the most famous sets of artificial data sets. And rightly so, if you're not familiar with "Anscombe's Quartet", follow the above link.

Now that we've had that graphic reminder to LOOK AT THE DATA, I'm going to skip the usual next step of writing about what to do, and instead refer you, kind reader, to the discussion of this data at the Princeton Office of Population Research. The discussion is located at this link.

And after you look at that link, please: look at your data.