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About the Assessment: Target Population and Sample Size

The schools and students participating in NAEP assessments are selected to be representative of all schools nationally. The results from the assessed students are combined to provide accurate estimates of the overall performance of students in both public and nonpublic (private and Bureau of Indian Education schools) schools in the nation.

Because each school that participated in the assessment, and each student assessed, represents a portion of the population of interest, the results are weighted to account for the disproportionate representation of the selected sample. This includes oversampling of schools with high concentrations of students from certain racial/ethnic groups and the lower sampling rates of students who attend very small schools.

More information on sampling and weighting can be found in NAEP Technical Documentation.

Student sample sizes and target populations in NAEP geography, by grade and type of school: 2010
Grade Type of school Sample size Target population
4 Nation 7,200 3,934,000
Public 6,700 3,618,000
Private 500 316,000
8 Nation 9,700 3,662,000
Public 8,900 3,382,000
Private 800 276,000
12 Nation 10,200 3,164,000
Public 9,000 2,895,000
Private 1,200 268,000
NOTE: The sample size is rounded to the nearest hundred. The target population is rounded to the nearest thousand. Detail may not sum to totals because of rounding.
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2010 Geography Assessment.