Therapy Data

A toy data set on outcome in therapy in relation to a personality test (perstest) and a scale of internal-external locus of control (IE) used to illustrate linear and multiple regression.

Usage

data("therapy")

Format

A data frame with 10 observations on the following 4 variables.

sex

a factor with levels F M

perstest

score on a personality test, a numeric vector

therapy

outcome in psychotherapy, a numeric vector

IE

score on a scale of internal-external locus of control, a numeric vector

Examples

data(therapy)
plot(therapy ~ perstest, data=therapy, pch=16)
abline(lm(therapy ~ perstest, data=therapy), col="red")


plot(therapy ~ perstest, data=therapy, cex=1.5, pch=16, 
  col=ifelse(sex=="M", "red","blue"))