Anscombe's Quartet

Anscombe's Quartet refers to four datasets created by Francis Anscombe in 1973, each containing 11 (x,y) points.

While these datasets share nearly identical summary statistics (means, standard deviations, and correlation coefficients), they produce dramatically different graphical representations.

This work is widely cited in statistics education to emphasize the necessity of visualizing data rather than relying solely on numerical analysis.