This data set consists of 60 observations for two variables (ydata and xdata). The appropriate regression model for the first fiftyfourth obsertvations should be like
y = x^2 + e
the last sixth comes from a different model.
Usage
data(selection)
Format
xdata is a vector which contains x,x^2, while ydata contains the dependent variable's observations.
Source
Agostinelli, C. (1999)
Robust model selection in regression via weighted likelihood methodology, submitted to Statistics & Probability Letters, revised december 1999.