NAEP Technical DocumentationSchool Nonresponse Adjustment Factors

The school-level nonresponse adjustment factor for the i ^th school in the h ^th class was computed as:

F superscript open paren 1 closed paren sub h = open bracket summation over i an element of C sub h of open paren W superscript t s c h sub h i multiplied by E sub h i closed paren closed bracket divided by open bracket summation over i an element of C sub h of open paren W superscript t s c h sub h i multiplied by E sub h i multiplied by delta sub h i closed paren closed bracket

where
	equals the number of eligible sample schools in class h,
	is the trimmed school base weight of the i ^th school in class h,
	equals the grade enrollment for the i ^th school in class h,

Both the numerator and denominator of the nonresponse adjustment factor contained only schools that were determined to have eligible students enrolled.

In the calculation of the above nonresponse adjustment factors, a school was said to have participated if:

it was selected for the sample from the frame or from the lists of new schools provided by participating school districts, and student assessment data were obtained from the school; or
the school participated as a substitute school and student assessment data were obtained (so that the substitute participated in place of the originally selected school).

The nonresponse-adjusted weight for the i^th school in class h was computed as:

where

F_h⁽¹⁾ is the school-level nonresponse adjustment factor for the i^th school in the h^thclass, and
W_hi^tsch is the trimmed school base weight of the i^th school in class h

The following tables show the distribution of the school-level nonresponse adjustment factor SCNRA among the 2000 state assessment's participating jurisdictions by grade (fourth and eighth), assessment subject (mathematics and science), and reporting population. Reporting populations differ by whether students with disabilities or limited-English-proficient (SD/LEP) students were offered accommodations during testing. The non-accommodated reporting population, also known as the R2 reporting population, includes all non SD/LEP students plus SD/LEP students from non-accommodated sessions. The accommodated reporting population, also known as the R3 reporting population, includes all non SD/LEP students plus SD/LEP students from accommodated sessions.

Distribution of the School-Level Nonresponse Adjustment Factor (SCNRA)

Grade 4 Mathematics (Accommodations Not Permitted [R2])
Grade 4 Science (Accommodations Not Permitted [R2])

Grade 4 Mathematics (Accommodations Permitted [R3])
Grade 4 Science (Accommodations Permitted [R3])

Grade 8 Mathematics (Accommodations Not Permitted [R2])
Grade 8 Science (Accommodations Not Permitted [R2])

Grade 8 Mathematics (Accommodations Permitted [R3])
Grade 8 Science (Accommodations Permitted [R3])

Last updated 17 April 2008 (TS)

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