DatPopM {Frames2}

Database of auxiliary information for the whole population of students

Description

This dataset contains population information about the auxiliary variables of the population of students

Usage

DatPopM

Format

Ses

An ordinal factor with three categories (low, middle and high) indicating the socio-economical status of the student.

Read

A number indicating the mark of the student in a reading test.

Write

A number indicating the mark of the student in a writing test.

Domain

A string indicating the domain each student belongs to. Possible values are "a" if student belongs to domain a, "b" if student belongs to domain b or "ab" if student belongs to overlap domain.

Details

The population size is N = 10000.

See Also

DatMA DatMB

Examples

data(DatPopM)
attach(DatPopM)
#Let perform a brief descriptive analysis for the three auxiliary variables
summary (Ses)
summary(Read)
summary(Write)