twins

The given data are IQ scores from identical twins; one raised in a foster home, and the other raised by birth parents.

datasets

This package is a companion to the textbook S. Weisberg
        (in press), "Applied Linear Regression," 4rd edition, Wiley. It
        includes all the data sets discussed in the book and one
        function to access the textbook's website.  This package
        depends on the car package.  Many data files in this package
        are included in the alr3 package as well, so only one of them
        should be loaded.

Sanford Weisberg

alr4

Data to accompany Applied Linear Regression 4rd edition

twins function

Burt, C. (1966). The genetic estimation of differences in intelligence: A study of monozygotic twins reared together and apart. <em>Br. J. Psych.</em>, 57, 147-153.

twins: Burt's twin data

Description

Arguments

source

References

Examples