cog {pairwise} | R Documentation |
Data from the german sample of the PISA 2003 survey, containing 31 dichotomous items from the math task.
data(cog)
A data frame containing 34 variables and 4660 obsevations.
The first 3 variables are ID variables. For further Information on variables and their meaning see the codebook PDF file
available at https://www.oecd.org/pisa/pisaproducts/PISA12_cogn_codebook.pdf
Database - PISA 2003, Downloadable Data, https://www.oecd.org/pisa/data/pisa2012database-downloadabledata.htm
data(cog) dim(cog) ############################################################## names(cog) # show all variable names of data.frame cog names(cog[,4:34]) # show the variable names of the math items names(cog[,1:3]) # show the variable names of the ID variables