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 4 Reading State Assessment, By Scale and Jurisdiction: 2009

NAEP Technical DocumentationProportion of scale score variance accounted for by the population-structure model, grade 4 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	274	0.61	0.59
Alaska	225	0.64	0.66
Arizona	347	0.68	0.71
Arkansas	293	0.68	0.65
California	385	0.70	0.70
Colorado	302	0.71	0.69
Connecticut	288	0.63	0.65
Delaware	259	0.55	0.54
Florida	378	0.60	0.60
Georgia	316	0.60	0.57
Hawaii	301	0.65	0.67
Idaho	305	0.64	0.64
Illinois	347	0.64	0.66
Indiana	277	0.60	0.58
Iowa	297	0.63	0.62
Kansas	290	0.60	0.62
Kentucky	284	0.49	0.51
Louisiana	278	0.60	0.58
Maine	303	0.60	0.60
Maryland	270	0.52	0.55
Massachusetts	339	0.63	0.64
Michigan	297	0.58	0.61
Minnesota	343	0.65	0.66
Mississippi	275	0.57	0.58
Missouri	289	0.61	0.61
Montana	338	0.60	0.61
Nebraska	289	0.61	0.62
Nevada	297	0.61	0.58
New Hampshire	305	0.59	0.62
New Jersey	295	0.60	0.54
New Mexico	356	0.67	0.68
New York	359	0.59	0.60
North Carolina	396	0.65	0.66
North Dakota	275	0.56	0.60
Ohio	277	0.58	0.61
Oklahoma	350	0.66	0.66
Oregon	323	0.64	0.68
Pennsylvania	321	0.64	0.67
Rhode Island	268	0.63	0.66
South Carolina	305	0.58	0.64
South Dakota	317	0.57	0.55
Tennessee	278	0.58	0.61
Texas	338	0.62	0.64
Utah	299	0.60	0.66
Vermont	277	0.62	0.57
Virginia	292	0.68	0.64
Washington	330	0.65	0.66
West Virginia	273	0.57	0.59
Wisconsin	350	0.62	0.65
Wyoming	273	0.65	0.62
Other jurisdictions
District of Columbia	180	0.61	0.62
DoDEA2	240	0.58	0.54

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