pairwise (version 0.2.2)

cog: Math PISA (2003) data

Description

Data from the german sample of the PISA 2003 survey, containing 31 dichotomous items from the math task.

Usage

data(cog)

format

A data frame containing 34 variables and 4660 obsevations.

source

http://pisa2003.acer.edu.au/downloads.php{http://pisa2003.acer.edu.au/downloads.php}

Details

The first 3 variables are ID variables. For further Information on variables and their meaning see the codebook PDF file available at http://pisa2003.acer.edu.au/downloads.php{http://pisa2003.acer.edu.au/downloads.php}

References

Database - PISA 2003, Downloadable Data, http://pisa2003.acer.edu.au/downloads.php{http://pisa2003.acer.edu.au/downloads.php}

Examples

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