NAEP Technical Documentation Proportion of Scale Score Variance Accounted for by the Population-Structure Model, Grade 8 Science State Assessment, by State/Jurisdiction: 2015

Proportion of scale score variance accounted for by the population-structure model, grade 8 science state assessment, by state/jurisdiction: 2015
State/jurisdiction	Number of principal components²	Proportion of scale score variance accounted for by the population-structure model¹
State/jurisdiction	Number of principal components²	Univariate
Alabama	250	.72
Arizona	282	.68
Arkansas	278	.66
California	313	.76
Connecticut	285	.73
Delaware	250	.71
Florida	328	.67
Georgia	294	.66
Hawaii	256	.72
Idaho	280	.63
Illinois	291	.68
Indiana	272	.65
Iowa	268	.66
Kansas	282	.67
Kentucky	266	.60
Maine	274	.63
Maryland	271	.69
Massachusetts	272	.73
Michigan	267	.68
Minnesota	276	.71
Mississippi	255	.68
Missouri	270	.67
Montana	260	.64
Nebraska	264	.67
Nevada	294	.69
New Hampshire	257	.58
New Jersey	267	.68
New Mexico	284	.68
New York	300	.71
North Carolina	298	.70
North Dakota	261	.65
Ohio	257	.72
Oklahoma	270	.66
Oregon	284	.66
Rhode Island	248	.71
South Carolina	286	.67
South Dakota	258	.63
Tennessee	252	.66
Texas	311	.72
Utah	126	.41
Vermont	247	.64
Virginia	285	.68
Washington	280	.70
West Virginia	239	.55
Wisconsin	266	.67
Wyoming	230	.59
Other jurisdictions
DoDEA	216	.59
¹ (Total Variance – Residual Variance) / Total Variance, where Total Variance consists of sampling, measurement, and other sources of error. ² Excluding the constant term. NOTE: Univariate scale. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2015 Science Assessment.

Proportion of scale score variance accounted for by the population-structure model, grade 8 science state assessment, by subscale and state/jurisdiction: 2015
State/jurisdiction	Number of principal components²	Proportion of scale score variance accounted for by the population-structure model¹
State/jurisdiction	Number of principal components²	Physical science	Earth and space sciences	Life science
Alabama	250	.77	.76	.79
Arizona	282	.74	.72	.68
Arkansas	278	.71	.71	.70
California	313	.81	.80	.80
Connecticut	285	.78	.76	.75
Delaware	250	.75	.76	.69
Florida	328	.75	.71	.71
Georgia	294	.72	.73	.66
Hawaii	256	.72	.76	.74
Idaho	280	.72	.64	.65
Illinois	291	.75	.73	.69
Indiana	272	.71	.69	.68
Iowa	268	.73	.68	.69
Kansas	282	.73	.71	.71
Kentucky	266	.71	.64	.62
Maine	274	.67	.65	.69
Maryland	271	.72	.75	.71
Massachusetts	272	.74	.75	.76
Michigan	267	.72	.73	.67
Minnesota	276	.80	.74	.69
Mississippi	255	.76	.71	.73
Missouri	270	.70	.67	.73
Montana	260	.68	.67	.66
Nebraska	264	.73	.70	.67
Nevada	294	.76	.76	.71
New Hampshire	257	.62	.63	.61
New Jersey	267	.74	.70	.70
New Mexico	284	.74	.76	.69
New York	300	.79	.75	.71
North Carolina	298	.75	.74	.75
North Dakota	261	.73	.66	.67
Ohio	257	.77	.74	.74
Oklahoma	270	.73	.71	.68
Oregon	284	.72	.71	.66
Rhode Island	248	.76	.72	.72
South Carolina	286	.76	.70	.72
South Dakota	258	.69	.70	.67
Tennessee	252	.68	.71	.69
Texas	311	.77	.74	.75
Utah	126	.39	.44	.41
Vermont	247	.71	.66	.67
Virginia	285	.74	.74	.69
Washington	280	.75	.72	.72
West Virginia	239	.59	.60	.59
Wisconsin	266	.71	.70	.68
Wyoming	230	.61	.64	.63
Other jurisdictions
DoDEA	216	.68	.67	.63
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 Science Assessment.

Last updated 30 November 2021 (ML)

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