twins: Burt's IQ data for twins

Description Usage Format Source Examples

Description

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

Usage

1

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

1
2
data(twins)
plot(Foster ~ Biological, twins)

Example output

Loading required package: MASS
Loading required package: HistData
Loading required package: Hmisc
Loading required package: lattice
Loading required package: survival
Loading required package: Formula
Loading required package: ggplot2

Attaching package: 'Hmisc'

The following objects are masked from 'package:base':

    format.pval, round.POSIXt, trunc.POSIXt, units


Attaching package: 'UsingR'

The following object is masked from 'package:survival':

    cancer

UsingR documentation built on May 29, 2017, 11:59 a.m.

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