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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.
Last updated 31 March 2008 (GF)

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