NAEP Technical DocumentationRaking Adjustment Control Totals for the 2015 Assessment

The control totals used in the raking procedure for NAEP 2015 at grades 4 and 8 were estimates of the student population derived from the set of assessed and excluded students pooled across subjects. The control totals for category c within dimension d were computed as follows: 

 

where

• R_c(d) is the set of all assessed students in category c of dimension d,

•  E_c(d) is the set of all excluded students in category c of dimension d,

• STU_BWT_k is the student base weight for a given student k,

• SCH_TRIM_k  is the school-level weight trimming factor for the school associated with student k,

• SCH_NRAF_k is the school-level nonresponse adjustment factor for the school associated with student k,

• STU_NRAF_k is the student-level nonresponse adjustment factor for student k, and

• SUBJFAC_k is the subject factor for student k.

The student weight used in the calculation of the control totals above is the adjusted student base weight, without regard to subject, adjusted for school weight trimming, school nonresponse, and student nonresponse. Control totals were computed for the full sample and for each replicate independently.

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