ds6: Data Set 6: IQ and Brain Size

In ngay/kustats: Data sets and functions for statistics classes at Keiser University

Description

The data are obtained from monozygotic (identical) twins. Data provided by M.J.Tramo, W.C. loftus, T.A. Stukel, J.B. Weaver, M.S. Gazziniga. See "Brain Size, Head Size, and IQ in Monozygotic Twins, " Neurology, Vol. 50.

• PAIR identifies the set of twins

• SEX is the gender of the subject (1 = male, 2 = female)

• ORDER is the birth order

• IQ is full-scale IQ

• VOL is total brain volumne (cm^3)

• AREA is total brain surface area (cm^2)

• CCSA is corpus callsum (fissure connecting left and right crebral hemispheres) surface area (cm^2)

• CIRC is head circumference (cm)

• WT is body weight (kg)

Format

A data frame with 20 rows and 9 variables

Source

Triola, M. 2014. Elementary Statistics, 12th ed. Boston, MA: Pearson.

ngay/kustats documentation built on May 23, 2019, 4:41 p.m.