Participation Rates in Economics
The school participation rate for the grade 12 economics assessment was 79 percent (83 percent for public schools and 41 percent for private schools). The student participation rate for economics was 73 percent (72 percent for students in public schools and 87 percent for students in private schools). To ensure unbiased samples, NCES statistical standards require that nonresponse bias analyses be conducted for any school or student group with a participation rate that falls below 85 percent. The results showed that school substitution and nonresponse adjustments were effective in reducing the observable nonresponse bias for public and private schools and for public school students.
A NAEP/Governing Board reporting rule requires that public/private and regional student groups will not be reported if the initial school participation rate falls below 70 percent. This requirement for the grade 12 economics assessment was not met for private schools, for any subcategory of private schools, or for schools in the western region; therefore, data for these groups are not provided in this report or on the NAEP website.
National school and student participation rates in NAEP economics at grade 12, by type of school: 2006
The student-weighted school participation rates are calculated based on the estimated number of students represented by either the initially selected schools that participated in the assessment (before substitution) or the participating schools, whether originally selected or selected as a substitute for a school that chose not to participate (after substitution). The school-weighted school participation rates are calculated based on the estimated number of schools either before or after substitutions.