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NAEP Assessment Weighting Procedures → Weighting Procedures for the 2010 Assessment → Computation of Full-Sample Weights for the 2010 Assessment → School and Student Nonresponse Adjustments for the 2010 Assessment → School Nonresponse Weight Adjustment for the 2010 Assessment → School Nonresponse Adjustment Factor Calculation for the 2010 Assessment

NAEP Technical DocumentationSchool Nonresponse Adjustment Factor Calculation for the 2010 Assessment

In each final school nonresponse adjustment cell c, the school nonresponse adjustment factor SCH_NRAF_c was computed as follows:

SCH underscore NRAF subscript c equals open paren summation with underscript S subscript c SCH underscore BWT subscript c s times SCH underscore TRIM subscript s times SCHSESWT subscript s times cap x subscript s close paren divided by open paren summation with underscript R subscript c SCH underscore BWT subscript c comma s times SCH underscore TRIM subscript s times SCHSESWT subscript s times cap x subscript s

where

S_c is the set of all eligible sampled schools (cooperating original and substitute schools and refusing original schools with noncooperating or no assigned substitute) in cell c,
R_c is the set of all cooperating schools within S_c,
SCH_BWT_cs is the school base weight,
SCH_TRIM_s is the school-level weight trimming factor,
SCHSESWT_s is the school-level session assignment weight, and
X_s is the estimated grade enrollment corresponding to the original sampled school.

Last updated 12 August 2010 (DH)

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