twins {UsingR}

Burt's IQ data for twins

Description

IQ data of Burt on identical twins that were separated near birth.

Usage

data(twins)

Format

A data frame with 27 observations on the following 3 variables.

Foster

IQ for twin raised with foster parents

Biological

IQ for twin raised with biological parents

Social

Social status of biological parents

Source

This data comes from the R package that accompanies Julian Faraway's notes Practical Regression and Anova in R (now a book).

Examples

data(twins)
plot(Foster ~ Biological, twins)