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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 Model → Proportion of Scale Score Variance Accounted for by the Population-Structure Model, Grade 4 Reading Combined National and State Main Assessment, By Scale and Jurisdiction: 2007

NAEP Technical DocumentationProportion of scale score variance accounted for by the population-structure model, grade 4 reading combined national and state main assessment, by scale and jurisdiction: 2007
Jurisdiction Number of principal components Proportion1 of scale score variance accounted for by the population-structure model
Literary Information
1 (Total Variance – Residual Variance)/Total Variance, where Total Variance consists of both sampling and measurement error variance.
2 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), 2007 Reading National and State Assessments.
Alabama 252 0.55 0.56
Alaska 227 0.55 0.57
Arizona 314 0.61 0.64
Arkansas 251 0.57 0.65
California 355 0.58 0.61
Colorado 269 0.60 0.65
Connecticut 248 0.62 0.68
Delaware 244 0.47 0.51
Florida 310 0.51 0.54
Georgia 262 0.52 0.53
Hawaii 280 0.57 0.59
Idaho 291 0.55 0.56
Illinois 282 0.55 0.58
Indiana 251 0.56 0.56
Iowa 254 0.57 0.56
Kansas 272 0.55 0.54
Kentucky 238 0.48 0.48
Louisiana 236 0.58 0.57
Maine 259 0.55 0.55
Maryland 240 0.51 0.55
Massachusetts 278 0.56 0.60
Michigan 253 0.54 0.61
Minnesota 282 0.57 0.60
Mississippi 244 0.48 0.51
Missouri 254 0.55 0.53
Montana 299 0.58 0.63
Nebraska 260 0.59 0.59
Nevada 292 0.58 0.62
New Hampshire 271 0.54 0.56
New Jersey 249 0.58 0.55
New Mexico 307 0.64 0.61
New York 286 0.58 0.62
North Carolina 325 0.58 0.59
North Dakota 271 0.49 0.50
Ohio 251 0.52 0.57
Oklahoma 309 0.63 0.63
Oregon 293 0.62 0.66
Pennsylvania 254 0.60 0.61
Rhode Island 260 0.61 0.64
South Carolina 259 0.54 0.54
South Dakota 283 0.54 0.56
Tennessee 247 0.52 0.54
Texas 319 0.50 0.52
Utah 262 0.58 0.59
Vermont 264 0.57 0.62
Virginia 264 0.54 0.51
Washington 305 0.60 0.62
West Virginia 252 0.56 0.57
Wisconsin 264 0.58 0.60
Wyoming 270 0.56 0.52
  Other jurisdictions
District of Columbia 179 0.55 0.60
DoDEA2 261 0.46 0.49
Last updated 18 February 2010 (JL)

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