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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 Permitted [R3]): 2000

NAEP Technical DocumentationProportion of scale score variance accounted for by the population-structure models, grade 8 science state assessment (accommodations permitted [R3]): 2000

Jurisdiction	Number of principal components2	Proportion1 of scale score variance
		Physical science	Earth science	Life science
Alabama	219	0.75	0.72	0.69
Arizona	208	0.73	0.77	0.74
Arkansas	220	0.72	0.72	0.74
California	214	0.76	0.77	0.76
Connecticut	225	0.72	0.74	0.72
Georgia	240	0.76	0.70	0.72
Hawaii	201	0.70	0.70	0.64
Idaho	198	0.72	0.70	0.70
Illinois	205	0.76	0.79	0.77
Indiana	198	0.74	0.76	0.72
Kentucky	221	0.68	0.62	0.67
Louisiana	226	0.81	0.78	0.74
Maine	215	0.63	0.61	0.67
Maryland	229	0.78	0.74	0.72
Massachusetts	227	0.73	0.69	0.72
Michigan	207	0.72	0.73	0.73
Minnesota	190	0.69	0.68	0.72
Mississippi	220	0.71	0.67	0.67
Missouri	224	0.72	0.68	0.71
Montana	183	0.73	0.70	0.71
Nebraska	198	0.72	0.70	0.74
Nevada	218	0.73	0.67	0.68
New Mexico	224	0.80	0.71	0.74
New York	205	0.81	0.82	0.83
North Carolina	236	0.73	0.74	0.69
North Dakota	199	0.65	0.64	0.65
Ohio	205	0.72	0.68	0.69
Oklahoma	223	0.69	0.63	0.62
Oregon	215	0.77	0.71	0.74
Rhode Island	204	0.71	0.71	0.69
South Carolina	220	0.75	0.74	0.72
Tennessee	220	0.70	0.71	0.73
Texas	232	0.74	0.73	0.73
Utah	227	0.70	0.67	0.66
Vermont	193	0.70	0.69	0.70
Virginia	237	0.72	0.68	0.68
West Virginia	227	0.68	0.68	0.72
Wyoming	199	0.60	0.58	0.64
Other jurisdictions
American Samoa	124	0.88	0.90	0.88
DDESS3	142	0.78	0.77	0.82
DoDDS4	178	0.61	0.63	0.59
Guam	147	0.70	0.69	0.68
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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