timss.reg {intsvy}

Regression analysis

Description

timss.reg performs linear regression analysis (OLS) for an observed depedent variable (NOT for plausible values)

Usage

timss.reg(y, x, by, data, 
export = FALSE, name = "output", folder = getwd())

Arguments

y

Label for dependent variable.

x

Data labels of independent variables.

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, containing the data from TIMSS.

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.

Value

timss.reg prints a data.frame with regression results (i.e., coefficients, standard errors, t-values, R-squared) and stores different regression output including residuals and replicate coefficients in a list object of class "intsvy.reg".

See Also

pirls.reg

Examples

## Not run: 
timss.reg(y="BSDAGE", x="ITSEX", by="IDCNTRYL", data=timss8g)

## End(Not run)