NAEP Analysis and Scaling → Estimation of Population and Student Group Distributions → Examining the Population-Structure Models Used in NAEP → Proportion of Scale Score Variance Accounted for by the Population-Structure Models → Proportion of Scale Score Variance Accounted for by the Population-Structure Model, Grade 8 Reading State Assessment, By Scale and Jurisdiction: 2009

NAEP Technical DocumentationProportion of scale score variance accounted for by the population-structure model, grade 8 reading state assessment, by scale and jurisdiction, 2009

Jurisdiction	Number of principal components	Proportion1 of scale score variance accounted for by the population-structure model
		Literary	Information
1 (Total Variance – Residual Variance)/Total Variance, where Total Variance consists of both sampling and measurement error variance. 2 Department of Defense Education Activity. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2009 Reading State Assessment.
Alabama	249	0.65	0.68
Alaska	173	0.50	0.56
Arizona	345	0.66	0.73
Arkansas	273	0.69	0.64
California	349	0.70	0.74
Colorado	295	0.64	0.71
Connecticut	274	0.65	0.70
Delaware	217	0.55	0.60
Florida	320	0.59	0.66
Georgia	282	0.67	0.64
Hawaii	238	0.65	0.65
Idaho	285	0.63	0.67
Illinois	307	0.63	0.68
Indiana	267	0.58	0.62
Iowa	270	0.61	0.66
Kansas	287	0.67	0.65
Kentucky	270	0.56	0.55
Louisiana	274	0.65	0.72
Maine	270	0.59	0.61
Maryland	263	0.63	0.66
Massachusetts	289	0.63	0.69
Michigan	277	0.62	0.64
Minnesota	295	0.66	0.70
Mississippi	251	0.65	0.61
Missouri	279	0.60	0.66
Montana	304	0.62	0.65
Nebraska	266	0.65	0.72
Nevada	286	0.65	0.65
New Hampshire	247	0.58	0.62
New Jersey	274	0.60	0.65
New Mexico	322	0.70	0.73
New York	306	0.63	0.66
North Carolina	341	0.65	0.69
North Dakota	257	0.67	0.72
Ohio	274	0.61	0.64
Oklahoma	345	0.67	0.71
Oregon	315	0.65	0.69
Pennsylvania	282	0.66	0.69
Rhode Island	237	0.64	0.67
South Carolina	275	0.63	0.66
South Dakota	297	0.58	0.64
Tennessee	256	0.62	0.61
Texas	306	0.67	0.67
Utah	292	0.65	0.67
Vermont	252	0.61	0.65
Virginia	296	0.67	0.69
Washington	315	0.68	0.67
West Virginia	260	0.61	0.63
Wisconsin	293	0.62	0.67
Wyoming	220	0.64	0.65
Other jurisdictions
District of Columbia	167	0.61	0.68
DoDEA2	193	0.60	0.64

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