intsvy (version 2.9)

timss.mean.pv: Calculates mean achievement score

Description

timss.mean.pv uses five plausible values to calculate the mean achievement score and its standard error

Usage

timss.mean.pv(pvlabel, by, data, 
export = FALSE, name = "output", folder = getwd())

Value

timss.mean.pv returns a data frame with the mean values and standard errors.

Arguments

pvlabel

The names of columns corresponding to the achievement plausible scores, for example, paste0("BSMMAT0", 1:5).

by

The label for the grouping variable, usually the countries (i.e., by="IDCNTRYL"), but could be any other categorical variable.

data

An R object, normally a data frame.

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.

See Also

pirls.mean.pv, pisa.mean.pv

Examples

if (FALSE) {
timss.mean.pv(pvlabel= paste0("BSMMAT0", 1:5), by= "IDCNTRYL", data=timss4g)
timss.mean.pv(pvlabel= paste0("BSMMAT0", 1:5), by= c("IDCNTRYL", "ITSEX"), data=timss8g)
}