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Sampling Stages

2000 National Main Assessment

  • Fourth- and twelfth-grade students

    • Selected geographic primary sampling units

    • Selected schools from primary sampling units

    • Assigned sessions to schools

    • Selected students from schools

  • Eighth-grade students

    • Selected schools within the integrated national and state samples

    • Assigned sessions to schools

    • Selected students from schools

2000 State Assessment

  • Sampling began within a participating state/jurisdiction

  • Selected schools from jurisdiction

  • Assigned sessions to schools

  • Selected students from schools

The integrated approach of the 2000 national main and state assessment for eighth-grade school samples combined the national and state samples after data collection. This approach produced a larger sample that yielded more precise estimates. Because the state assessment focused on public schools, no private school students appeared in the 2000 national main assessment eighth grade.


Last updated 19 March 2008 (GF)

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