NAEP Analysis and Scaling - Proportion of Scale Score Variance Accounted for by the Population-Structure Models, Grade 8 Science Combined National and State Main Assessment, By Subscale and Jurisdiction: 2005

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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 Combined National and State Main Assessment, by Subscale and Jurisdiction: 2005

NAEP Technical DocumentationProportion of scale score variance accounted for by the population-structure models, grade 8 science combined national and state main assessment, by subscale and jurisdiction: 2005
Jurisdiction	Number of principal components²	Proportion¹ of scale score variance accounted for by the population-structure model
Jurisdiction	Number of principal components²	Physical	Earth	Life
Alabama	185	0.68	0.65	0.65
Arizona	215	0.60	0.57	0.59
Arkansas	201	0.66	0.61	0.63
California	304	0.58	0.58	0.60
Colorado	203	0.63	0.59	0.62
Connecticut	192	0.65	0.61	0.63
Delaware	162	0.53	0.55	0.56
Florida	237	0.57	0.59	0.55
Georgia	209	0.64	0.61	0.60
Hawaii	184	0.61	0.51	0.59
Idaho	197	0.56	0.55	0.58
Illinois	210	0.66	0.59	0.61
Indiana	198	0.65	0.61	0.59
Kentucky	205	0.47	0.47	0.49
Louisiana	186	0.70	0.62	0.62
Maine	188	0.54	0.49	0.48
Maryland	190	0.62	0.60	0.64
Massachusetts	215	0.63	0.57	0.59
Michigan	194	0.60	0.60	0.58
Minnesota	198	0.67	0.60	0.65
Mississippi	184	0.64	0.60	0.59
Missouri	203	0.59	0.57	0.59
Montana	195	0.59	0.52	0.54
Nevada	203	0.65	0.61	0.59
New Hampshire	185	0.56	0.53	0.52
New Jersey	198	0.62	0.58	0.63
New Mexico	206	0.62	0.62	0.59
North Carolina	210	0.59	0.57	0.53
North Dakota	185	0.53	0.46	0.53
Ohio	204	0.62	0.62	0.61
Oklahoma	209	0.58	0.57	0.57
Oregon	208	0.57	0.56	0.59
Rhode Island	174	0.62	0.60	0.62
South Carolina	189	0.63	0.56	0.61
South Dakota	193	0.61	0.54	0.59
Tennessee	188	0.60	0.59	0.59
Texas	261	0.59	0.54	0.56
Utah	201	0.60	0.57	0.57
Vermont	183	0.53	0.47	0.51
Virginia	200	0.59	0.61	0.54
Washington	216	0.58	0.54	0.53
West Virginia	186	0.54	0.53	0.52
Wisconsin	195	0.64	0.58	0.64
Wyoming	167	0.60	0.55	0.54
Other jurisdictions
DoDEA³	175	0.57	0.48	0.58
¹ (Total Variance – Residual Variance)/Total Variance, where Total Variance consists of both sampling and measurement error variance. ²Excluding the constant term. ³ 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), 2005 Science Assessment.

Last updated 14 May 2009 (RF)

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