NAEP Analysis and Scaling- Proportion of Scale Score Variance Accounted for by the Population-Structure Models, by Jurisdiction, Grade 8 Writing Combined National and State Assessment: 2002

NAEP Technical DocumentationProportion of scale score variance accounted for by the population-structure models, by jurisdiction, grade 8 writing combined national and state assessment: 2002
Jurisdiction	Number of principal components	Proportion¹ of scale score variance
Alabama	217	0.67
Arizona	249	0.68
Arkansas	226	0.66
California	240	0.64
Connecticut	241	0.65
Delaware	195	0.58
Florida	262	0.66
Georgia	256	0.65
Hawaii	219	0.63
Idaho	208	0.65
Indiana	205	0.64
Kansas	202	0.64
Kentucky	218	0.59
Louisiana	230	0.69
Maine	222	0.63
Maryland	230	0.66
Massachusetts	240	0.69
Michigan	229	0.68
Mississippi	211	0.67
Missouri	227	0.62
Montana	182	0.69
Nebraska	194	0.64
Nevada	220	0.66
New Mexico	244	0.64
New York	212	0.69
North Carolina	256	0.61
North Dakota	182	0.65
Ohio	218	0.67
Oklahoma	243	0.66
Oregon	220	0.64
Pennsylvania	245	0.67
Rhode Island	205	0.66
South Carolina	251	0.69
Tennessee	199	0.69
Texas	266	0.66
Utah	248	0.61
Vermont	194	0.64
Virginia	267	0.66
Washington	227	0.64
West Virginia	219	0.66
Wyoming	190	0.59
Other jurisdictions
American Samoa	125	0.82
District of Columbia	170	0.65
DDESS²	140	0.77
DoDDS³	160	0.53
Guam	145	0.67
Virgin Islands	118	0.70
¹ (Total Variance – Residual Variance)/Total Variance, where Total Variance consists of both sampling and measurement error variance. ² Department of Defense Domestic Dependent Elementary and Secondary Schools. ³Department 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), 2002 Writing Assessment.

Last updated 13 February 2009 (GF)