R/ds08_IQ_and_Brain_Size.R

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

#' Data Set 8: IQ and Brain Size
#'
#' 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.
#' \itemize{
#' \item PAIR identifies the set of twins
#' \item SEX is the gender of the subject (1 = male, 2 = female)
#' \item ORDER is the birth order
#' \item IQ is full-scale IQ
#' \item VOL is total brain volumne (cm^3)
#' \item AREA is total brain surface area (cm^2)
#' \item CCSA is corpus callsum (fissure connecting left and right crebral hemispheres)
#' surface area (cm^2)
#' \item CIRC is head circumference (cm)
#' \item WT is body weight (kg)
#' }
#'
#' @format A data frame with 20 rows and 9 variables
#' @source Triola, M. 2018. Elementary Statistics, 13th ed. Boston, MA: Pearson.
#' @name ds08_IQ_and_Brain_Size
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