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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 Model, Mathematics Combined National and State Assessment, by Subscale and Grade: 2022
NAEP Technical DocumentationProportion of Scale Score Variance Accounted for by the Population-Structure Model, Mathematics Combined National and State Assessment, by Subscale and Grade: 2022
| Grade | Number of initial conditioning contrasts | Number of principal components and contrast-coded direct covariates | Proportion of scale score variance | ||||
|---|---|---|---|---|---|---|---|
| Number properties and operations | Measurement | Geometry | Data analysis, statistics, and probability | Algebra | |||
| (Total Variance – Residual Variance) / Total Variance, where Total Variance includes variance accounted and unaccounted for by the variables in the population-structure model. | |||||||
| Excluding the constant term. | |||||||
| In 2022, grade 12 was not assessed. | |||||||
| U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2022 Mathematics Assessment. | |||||||
| 4 | 2208 | 696 | .65 | .68 | .63 | .64 | .65 |
| 8 | 2644 | 817 | .69 | .69 | .67 | .70 | .70 |
Last updated 24 July 2024 (SK)