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Anscombe's Quartet


Anscombe's quartet: Four identical regressions

“Anscombe's quartet comprises four datasets that have nearly identical simple statistical properties, yet appear very different when graphed. Each dataset consists of eleven (x,y) points. They were constructed in 1973 by the statistician Francis Anscombe to demonstrate both the importance of graphing data before analyzing it and the effect of outliers on statistical properties.”


Data sets are available in the files at the bottom of this page.





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