Pays ou région | Sri Lanka |
Année | 2012 |
Producteur(s) | National Educational Research and Evaluation Centre - University of Colombo |
Métadonnées |
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Créé le
13 mars 2015
Dernière modification
13 mars 2015
Echantillonnage
Méthode d'échantillonnage
The sampling frame was the 2009 school database of the Ministry of Education.
Schools were selected using multi-stage sampling.
Classrooms were selected using simple random sampling.
Students were selected using simple random sampling.