SIMULATED data from an economic outlook poll
10,000 rows with three variables: age, income, pessimism
Data from a simple SIMULATION of people's pessimism about the economic state
based on age group and income group. Nothing about the real world should be
inferred from these data; they are merely to illustrate adjusting for covariates.
Source
The simulation is from "Statistical Modeling: A Fresh Approach" (2/e). Code for
it is in the file system.file("SM2-simulations.R", package="LSTbook")