Data simulated from from an ordered probit model with an interaction effect.
data(df5)
A data frame with 2000 rows and 3 variables.
x1
A continuous predictor variable.
x2
A factor with two levels: "Control"
and
"Treatment"
.
y
The response variable; an ordered factor.
Liu, Dungang and Zhang, Heping. Residuals and Diagnostics for Ordinal Regression Models: A Surrogate Approach. Journal of the American Statistical Association (accepted).
head(df5)#> y x1 x2 #> 1 1 4.652192 Control #> 2 2 3.301152 Control #> 3 1 4.004635 Control #> 4 1 6.834316 Control #> 5 1 5.202728 Control #> 6 2 1.253446 Control