NAEP Technical DocumentationProportion of Scale Score Variance Accounted for by the Population-Structure Model, Grade 8 Reading State Assessment, by Subscale and State/Jurisdiction: 2015

Proportion of scale score variance accounted for by the population-structure model, grade 8 reading state assessment, by subscale and state/jurisdiction: 2015

State/jurisdiction	Number of principal components2	Proportion of scale score variance accounted for by the conditioning model1
		Literary	Information
				Alabama	231	.68	.72
Alaska	97	.59	.61
Arizona	310	.69	.70
Arkansas	260	.67	.66
California	321	.74	.72
Colorado	260	.74	.74
Connecticut	270	.68	.70
Delaware	224	.67	.68
Florida	330	.63	.66
Georgia	272	.68	.68
Hawaii	235	.61	.62
Idaho	262	.70	.69
Illinois	277	.66	.69
Indiana	251	.61	.68
Iowa	259	.64	.69
Kansas	274	.66	.69
Kentucky	273	.59	.61
Louisiana	252	.67	.71
Maine	260	.70	.68
Maryland	262	.66	.67
Massachusetts	267	.73	.72
Michigan	257	.62	.68
Minnesota	284	.70	.69
Mississippi	236	.63	.65
Missouri	258	.67	.67
Montana	250	.69	.67
Nebraska	262	.70	.73
Nevada	285	.70	.70
New Hampshire	238	.67	.63
New Jersey	259	.64	.71
New Mexico	322	.68	.68
New York	273	.64	.66
North Carolina	304	.70	.71
North Dakota	280	.69	.65
Ohio	259	.68	.66
Oklahoma	323	.72	.75
Oregon	276	.72	.70
Pennsylvania	271	.70	.75
Rhode Island	231	.70	.70
South Carolina	258	.68	.72
South Dakota	302	.70	.67
Tennessee	237	.70	.69
Texas	303	.68	.69
Utah	146	.41	.43
Vermont	221	.64	.65
Virginia	272	.66	.70
Washington	295	.68	.72
West Virginia	231	.65	.62
Wisconsin	262	.64	.69
Wyoming	227	.63	.71
Other jurisdictions
District of Columbia	182	.65	.68
DoDEA	190	.69	.66
1 (Total Variance – Residual Variance) / Total Variance, where Total Variance consists of sampling, measurement, and other sources of error. 2 Excluding the constant term. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2015 Reading Assessment.

Printer-friendly Version