Table of Contents  |  Search Technical Documentation  |  References

NAEP Assessment Weighting Procedures → Weighting Procedures and Variance Estimation for the 2004 Assessment → Computation of Replicate Weights for the 2004 Assessment → Computation of School-Level Replicate Weights

NAEP Technical DocumentationComputing School-Level Replicate Base Weights for the 2004 Assessment

For the 2004 NAEP, the calculation of school-level replicate base weights SCH_BWT_js(r), r = 1,..., 62, were calculated as follows:

where

• SCH_BWT_js is the school base weight for school s in primary stratum j,

• R_jr is the set of schools within the r-th replicate stratum for primary stratum j, and

• U_js is the variance unit (1 or 2) for school s in primary stratum j.

For schools in replicate strata comprising three variance units, two sets of school-level replicate base weights were computed (see replicate variance estimation for details): one for the first replicate r₁ and another for the second replicate r₂. The two sets of school-level replicate base weights SCH_BWT_js(r₁), r₁ = 1,..., 62, and SCH_BWT_js(r₂), r₂ = 1,..., 62, were calculated as described below.  

 

 

Printer-friendly Version