Andrew Siegel's pathological 9-point dataset

A synthetic dataset created to test the robustness of fitted lines. Originally published by Andrew Siegel and later adapted in Hoaglin et al.'s book.

Usage

nine_point

Format

A data frame with 9 rows and 2 variables:

X

X values

Y

Y values

...

Source

Robust regression using repeated medians, Andrew F. Siegel, Biometrika, vol 69, n 1, 1982.

Understanding robust and exploratory data analysis, by D.C. Hoaglin, F. Mosteller and J.W. Tukey. 1983 (page 139)