- Surveys & Programs
- Data & Tools
- Fast Facts
- News & Events
- Publications & Products
- About Us
NAEP Analysis and Scaling → Estimation of Population and Student Group Distributions → Examining the Population-Structure Models Used in NAEP → Proportion of Scale Score Variance Accounted for by the Population-Structure Models → Proportion of Scale Score Variance Accounted for by the Population-Structure Models, Economics National Assessment, by Scale and Grade: 2012
| Grade | Number of initial group-defining contrasts2 |
Number of principal components2 | Proportion1 of scale score variance accounted for by the population-structure model | ||
|---|---|---|---|---|---|
| Market economy | National economy | International economy | |||
| 1 (Total Variance – Residual Variance)/Total Variance, where Total Variance consists of both sampling and measurement error variance. 2 Excluding the constant term. NOTE: Economics was assessed only at grade 12 in 2012. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2012 Economics Assessment. |
|||||
| 12 | 2,039 | 432 | 0.62 | 0.64 | 0.61 |
Last updated 01 July 2014 (GF)
