The variables are:
Concentr |
toxicant concentration |
Trouts |
number of trout eggs |
Dead |
number of eggs which died |
Source: O'Hara Hines & Carter (1993). Improved added variable and partial residual plots for the detection of influential observations in generalized linear models. Applied Statistics 42, 3-20.
The data are also reported by Hand et al. (1994), A Handbook of Small Data Sets, data set no.418.