STAT210prob2.35: STAT210prob2.35: Monozygotic Twins

In thoree/stat340: Data and functions for BIAS at NMBU

STAT210prob2.35: Monozygotic Twins

Description

An article in the journal Neurology observed that monozygotic twins (identical twins) share numerous physical, psychological, and pathological traits. This data is from the study where the investigators measured an intelligence score of 10 pairs of twins with ages between 24 and 43 years.

Usage

STAT210prob2.35

Format

A data frame with 10 observations (rows) and 3 variables (columns).

	Column name	Data type	Description	Values
[,1]	Pair	integer	The pair of identical twins	(1 - 10)
[,2]	Birth_order1	numeric	Intelligence score for twin 1	(6.03 - 7.99)
[,3]	Birth_order2	numeric	Intelligence score for twin 2	(5.73 - 8.76)

Details

This is data from Exercise 2.35 in Design and Analysis of Experiments, 9th Edition, EMEA Edition.

Source

Montgomery, D. C. (2019) Design and Analysis of Experiments, 9th Edition, EMEA Edition. New York: Wiley.

References

Tramo, M. J., et al. (1998) Brain size, head size, and intelligence quotient in monozygotic twins. Neurology, 50, 1246–-1252.

Examples

# A short summary of the variables
summary(STAT210prob2.35)

# Intelligence score for both twins
plot(STAT210prob2.35$Birth_order1,
     STAT210prob2.35$Birth_order2,
     xlab = "Intelligence score, twin 1",
     ylab = "Intelligence score, twin 2",
     main = "Intelligence score for both twins in all pairs of twins")

thoree/stat340 documentation built on June 30, 2024, 4:04 p.m.