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Download full textHedges, Larry V.; Bandeira de Mello, Victor – American Institutes for Research, 2013
In early 2001, to support an internal evaluation of the impact of changing exclusion rates on reports of statistically significant gains across states, the National Center for Education Statistics (NCES) sponsored research on imputation procedures of National Assessment of Educational Progress (NAEP) scores for the excluded students and provided…
Descriptors: National Competency Tests, Test Validity, Inclusion, Statistical Significance
