# R Dataset / Package car / Burt

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## Visual Summaries

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Dataset Help

On this Picostat.com statistics page, you will find information about the Burt data set which pertains to Fraudulent Data on IQs of Twins Raised Apart. The Burt data set is found in the car R package. You can load the Burt data set in R by issuing the following command at the console data("Burt"). This will load the data into a variable called Burt. If R says the Burt data set is not found, you can try installing the package by issuing this command install.packages("car") and then attempt to reload the data. If you need to download R, you can go to the R project website. You can download a CSV (comma separated values) version of the Burt R data set. The size of this file is about 394 bytes.

Documentation

## 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. The same data are in the dataset “twins" in the alr3 package, but with different labels.

### 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.

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Dataset imported from https://www.r-project.org.

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