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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 Models, Grade 8 Science State Assessment (Accommodations Not Permitted [R2]): By Jurisdiction, 2000

NAEP Technical DocumentationProportion of scale score variance accounted for by the population-structure models, grade 8 science state assessment (accommodations not permitted [R2]): By jurisdiction, 2000

Jurisdiction	Number of principal components2	Proportion1 of scale score variance
		Physical science	Earth science	Life science
Alabama	221	0.75	0.71	0.70
Arizona	205	0.76	0.76	0.75
Arkansas	217	0.76	0.72	0.71
California	203	0.75	0.74	0.74
Connecticut	220	0.71	0.71	0.70
Georgia	235	0.74	0.70	0.69
Hawaii	200	0.69	0.65	0.64
Idaho	192	0.69	0.66	0.69
Illinois	201	0.74	0.77	0.75
Indiana	196	0.71	0.78	0.72
Kentucky	215	0.64	0.62	0.65
Louisiana	223	0.79	0.75	0.74
Maine	203	0.62	0.61	0.65
Maryland	217	0.74	0.68	0.67
Massachusetts	214	0.72	0.66	0.69
Michigan	205	0.71	0.69	0.71
Minnesota	186	0.72	0.71	0.71
Mississippi	218	0.69	0.67	0.67
Missouri	211	0.70	0.64	0.68
Montana	175	0.70	0.64	0.69
Nebraska	203	0.69	0.67	0.68
Nevada	218	0.68	0.65	0.62
New Mexico	216	0.77	0.72	0.72
New York	192	0.77	0.80	0.81
North Carolina	220	0.70	0.69	0.66
North Dakota	190	0.67	0.64	0.62
Ohio	202	0.69	0.68	0.67
Oklahoma	218	0.71	0.64	0.66
Oregon	209	0.74	0.73	0.72
Rhode Island	198	0.65	0.65	0.65
South Carolina	220	0.72	0.71	0.70
Tennessee	217	0.70	0.73	0.70
Texas	227	0.75	0.74	0.72
Utah	225	0.70	0.66	0.64
Vermont	186	0.66	0.70	0.67
Virginia	225	0.74	0.69	0.67
West Virginia	215	0.62	0.64	0.68
Wyoming	195	0.61	0.58	0.64
Other jurisdictions
American Samoa	121	0.90	0.90	0.87
DDESS3	137	0.73	0.74	0.81
DoDDS4	173	0.61	0.65	0.62
Guam	146	0.74	0.73	0.70
1 Proportion is (Total Variance - Residual Variance)/Total Variance. 2 Excluding the constant term. 3 Department of Defense Domestic Dependent Elementary and Secondary Schools. 4 Department of Defense Dependents Schools (Overseas).
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2000 Science Assessment.

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