quartets dataset

Anscombe's (1973) Quartets

These are four x-y data sets, combined into a long format, which have the same traditional statistical properties (mean, variance, correlation, regression line, etc.). However, they look quite different. data

Format

A data frame with 44 observations on the following 3 variables.

• group: a categorical identifier for the quartet
• x: a continuous variable
• y: a continuous variable

quartets

Details

Data come default in R, but I elected to change the format to be a bit more accessible.

References

Anscombe, Francis J. (1973). "Graphs in Statistical Analysis." The American Statistician 27: 17–21.