ex1319 {Sleuth2} | R Documentation |
A 1989 study investigated the effect of heredity and environment on intelligence. Data are the IQ scores for adopted children whose biological and adoptive parents were categorized either in the highest or the lowest socioeconomic status category.
ex1319
A data frame with 38 observations on the following 3 variables.
IQ
Adoptive
"High"
and
"Low"
; the socioeconomic status of the adoptive parentsBiologic
"High"
and
"Low"
; the socioeconomic status of the biological parentsRamsey, F.L. and Schafer, D.W. (2002). The Statistical Sleuth: A Course in Methods of Data Analysis (2nd ed), Duxbury.
Capron, C. and Duyme, M. (1991). Children's IQ's and SES of Biological and Adoptive Parents in a Balanced Cross-fostering Study, European Bulletin of Cognitive Psychology 11(3): 323–348.
str(ex1319)