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error de observación
math.	erreur d'observation; erreur due aux observations mauvaises ou manquantes
med.	défaut d'observation
stat.	erreur due aux observations manquantes; erreur due aux observations mauvaises
stat., scient.	erreur non due à l'échantillonnage

error de observación: 4 phrases in 2 subjects

Communications	2
Statistics	2