NAEP Technical DocumentationSchool Nonresponse Adjustment Factor Calculation for the 2017 Assessment

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

 

SCH underscore NRAF subscript c equals open paren summation with underscript s is an element of S subscript c SCH underscore BWT subscript 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 s is an element of R subscript c SCH underscore BWT subscript s times SCH underscore TRIM subscript s times SCHSESWT subscript s times cap x subscript s close paren
    

where

  •  Sc 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,

  •  Rc is the set of all cooperating schools within Sc,

  •  SCH_BWTs is the school base weight,

  •  SCH_TRIMs is the school-level weight trimming factor,

  •  SCHSESWTs is the school-level session assignment weight, and

  •   Xs is the estimated grade enrollment corresponding to the original sampled school.

Last updated 01 April 2022 (SK)