- Surveys & Programs
- Data & Tools
- Fast Facts
- News & Events
- Publications & Products
- About Us
Twitter
NAEP Assessment Weighting Procedures → Weighting Procedures for the 2008 Assessment → Weighting Procedures for the 2008 LTT Assessment → Computation of Full-Sample Weights for the 2008 LTT Assessment → Computation of Base Weights for the 2008 LTT Assessment → School Base Weights for the 2008 LTT Assessment
NAEP Technical DocumentationSchool Base Weights for the 2008 LTT Assessment
 |
|||
The school base weight for an originally selected school is equal to the inverse of its overall probability of selection. The school overall probability of selection is equal to the product of two quantities:
- the probability of selection of the school within the selected PSU from the NAEP public school frame or private school frame.
A school that takes the place of a refusing original school is known as a "substitute school." A substitute school is treated as if it were the original school that it replaced and is assigned the school base weight of the original school.
Last updated 21 December 2009 (JL)