piaac.mean: Calculates mean of variable in PIAAC data
In dickli/intsvy2: International Assessment Data Manager 2

Description Usage Arguments Value See Also Examples

Calculates the mean of an observed variable (NOT one with plausible values) and its standard error.

1 2	piaac.mean(variable, by, data, export = FALSE, name = "output", folder = getwd())

`variable`	The label corresponding to the observed variable, for example, "AGE_R" for age of respondent.
`by`	The label for the grouping variable, usually the countries (i.e., by="CNTRYID"), but could be any other categorical variable.
`data`	An R object, normally a data frame, containing the data from PIAAC.
`export`	A logical value. If TRUE, the output is exported to a file in comma-separated value format (.csv) that can be opened from LibreOffice or Excel.
`name`	The name of the exported file.
`folder`	The folder where the exported file is located.

piaac.mean returns a data frame with means and standard errors.

pisa.mean, timss.mean, pirls.mean

## Not run: 
# install pbiecek/PIAAC package from github to have access to piaac data
piaac.mean(variable="AGE_R", by="CNTRYID", data=piaac)

## End(Not run)