The NAEP sampling and weighting staff generated final sample
weights and replicate weights for the 2002 assessment. There
were three components to the assessment: the national main
assessment in reading and writing; the state assessment in
reading and writing, which includes the Trial Urban District
Assessment (TUDA) samples; and the bridge studies. In years
prior to 2002, separate samples were drawn for the state
assessment and for the national assessment for public schools
grades 4 and 8. In 2002 for the first time the same sample of
schools and students in public schools grades 4 and 8 were used
for both the state assessment and for the national assessment in
jurisdictions which chose to participate in the state
assessment. The same sets of weights were used then for both
studies when this overlap occurred. These weights are described
only on the state assessment weights pages, and thus these pages
are the correct pages to refer to for the national assessment
weights in these overlapping samples. The natio