Fraudulent Data on IQs of Twins Raised Apart

Description

The Burt data frame has 27 rows and 4 columns. The ``data'' were simply (and notoriously) manufactured.

Usage

Burt

Format

This data frame contains the following columns:

IQbio

IQ of twin raised by biological parents

IQfoster

IQ of twin raised by foster parents

class

A factor with levels (note: out of order): high; low; medium.

Source

Burt, C. (1966) The genetic determination of differences in intelligence: A study of monozygotic twins reared together and apart. British Journal of Psychology 57, 137–153.