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NAEP Assessment Sample Design → NAEP 2018 Sample Design → Selection of Primary Sampling Units (PSUs) for the 2018 Assessment → Primary Sampling Unit (PSU) Frame Stratification for the 2018 Assessment → Final Primary Sampling Unit (PSU) Strata for the 2018 Assessment → Stratification for West Non-Metropolitan Noncertainty Primary Sampling Units
NAEP Technical DocumentationStratification for West Non-Metropolitan Noncertainty Primary Sampling Units
The following table provides the definition, number of PSUs, and size of each noncertainty PSU stratum in the West non-metropolitan primary stratum. Columns 2 and 3 show the primary and secondary characteristics, respectively, used to define the strata along with their respective cutoffs. The size of each stratum is given in the last column and is in terms of the number of youths (person 17 years of age and younger).
| Stratum | Primary stratifier | Secondary stratifier | PSUs | Measure of size |
|---|---|---|---|---|
| Total | † | † | 103 | 1,658,938 |
| 1 | Percentage of female-headed households <= 9.7 | Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth <= 12 | 27 | 417,593 |
| 2 | Percentage of female-headed households <= 9.7 | Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth > 12 | 28 | 404,250 |
| 3 | Percentage of female-headed households > 9.7 | Percentage of female-headed households <= 11.9 | 26 | 412,860 |
| 4 | Percentage of female-headed households > 9.7 | Percentage of female-headed households > 11.9 | 22 | 424,235 |
| Mean | † | † | † | 414,735 |
| † Not applicable. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2018 Assessment. | ||||
Last updated 08 December 2022 (PG)