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Table 7 The Average number (n) of omitted items and comparison of position effects in PISA 2012 mathematics between the different treatments of nonresponses due to omission in three selected countries

From: Predictors of individual performance changes related to item positions in PISA assessments

Country n Omitted as incorrect Omitted dropped
Cluster SE Cluster SE
Albania 13.23 −.127 .009 −.065 .009
Argentina 9.99 −.142 .008 −.087 .008
Montenegro 11.37 −.121 .008 −.071 .009