NAEP Assessment Weighting Procedures → Weighting Procedures for the 2008 Assessment → Weighting Procedures for the 2008 LTT Assessment → Computation of Full-Sample Weights for the 2008 LTT Assessment → School and Student Nonresponse Adjustments for the 2008 LTT Assessment → School Nonresponse Adjustment for the 2008 LTT Assessment → Development of Initial School Nonresponse Cells for the 2008 LTT Assessment

NAEP Technical DocumentationDevelopment of Initial School Nonresponse Cells for the 2008 LTT Assessment

The cells for nonresponse adjustments are generally functions of the school sampling strata for each individual sample age (9, 13, 17). Sampling strata definitions differ for public and private schools.

Public Schools

For public schools, initial weighting cells were formed within each age using the following nesting cell structure:

Private Schools

For private schools, initial weighting cells were formed within each age using the following nesting cell structure:

• census region;
• affiliation (Catholic or non-Catholic); and
• race/ethnicity classification.

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