NAEP Assessment Weighting Procedures → Weighting Procedures for the 2008 Assessment

NAEP Technical DocumentationWeighting Procedures for the 2008 Assessment

			Arts Assessment Weighting Procedures LTT Assessment Weighting Procedures

The NAEP 2008 sample design consisted of two assessments: arts and long-term trend (LTT).

Both assessments included separate sample components for public and private schools and both were based on a three-stage sample design:

• selection of primary sampling units (PSUs);
• selection of schools within strata, and
• selection of students within schools.

Weights were developed to reflect these three stages of selection and to adjust for school and student nonresponse. Replication-based variance methods were used to reflect the complex sample design.

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