NAEP Analysis and Scaling - Proportion of scale score variance accounted for by the population-structure model, grade 12 mathematics state assessment, by scale and jurisdiction: 2009

NAEP Technical DocumentationProportion of scale score variance accounted for by the population-structure model, grade 12 mathematics state assessment, by scale and jurisdiction: 2009
Jurisdiction	Number of principal components	Proportion¹of scale score variance accounted for by the population-structure model
Jurisdiction	Number of principal components	Number properties and operations	Measurement	Geometry	Data analysis, statistics, and probability
¹ (Total Variance – Residual Variance)/Total Variance, where Total Variance consists of both sampling and measurement error variance. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2009 Mathematics State Assessment.
Arkansas	271	0.87	0.81	0.81	0.82
Connecticut	260	0.86	0.82	0.80	0.85
Florida	272	0.73	0.72	0.72	0.77
Idaho	267	0.81	0.78	0.75	0.79
Illinois	250	0.86	0.82	0.80	0.86
Iowa	250	0.82	0.78	0.72	0.82
Massachusetts	266	0.83	0.77	0.77	0.81
New Hampshire	236	0.82	0.78	0.78	0.84
New Jersey	269	0.79	0.79	0.78	0.83
South Dakota	254	0.84	0.78	0.77	0.80
West Virginia	250	0.84	0.79	0.77	0.82

Last updated 05 January 2016 (GF)