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NAEP Weighting Procedures → 2003 Weighting Procedures and Variance Estimation → School and Student Nonresponse Adjustments → School Nonresponse Adjustment → School Nonresponse Adjustment Factor Calculation

NAEP Technical DocumentationSchool Nonresponse Adjustment Factor Calculation

The school nonresponse adjustment factor SNRADJ_js(c) for each school s in jurisdiction j and final school nonresponse adjustment cell c was computed as follows:

where

• S_j(c) is the set of all eligible original schools in cell c in jurisdiction j;

• R_j(c) is the set of all responding schools within S_j(c);

• w_js is the school base weight for school s in jurisdiction j;

• TRIM_js is the school-level trimming factor for school s in jurisdiction j;

• x_js is the estimated grade enrollment for school s in jurisdiction j; and

• SUBADJ_js is the substitution adjustment factor for school s in jurisdiction j to account for the difference in size between the substitute and its corresponding original school.

As a part of the No Child Left Behind legislation first implemented in 2003, all public school jurisdictions were required to participate in NAEP as a condition of receiving Title 1 funding. As a result, nearly every jurisdiction had close to 100 percent participation. The private schools, which are unaffected by this legislation, participated at a lower rate.

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