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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 Metropolitan Noncertainty Primary Sampling Units
NAEP Technical DocumentationStratification for West Metropolitan Noncertainty Primary Sampling Units
The following table provides the definition, number of PSUs, and size of each noncertainty PSU stratum in the West metropolitan primary stratum. Columns 2 through 4 show the characteristics 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 (persons 17 years of age and younger).
| Stratum | Primary stratifier | Secondary stratifier | Tertiary stratifier | PSUs | Measure of size |
|---|---|---|---|---|---|
| Total | † | † | † | 68 | 5,508,264 |
| 1 | Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth <= 18.4 | Percentage of renters <= 29.3 | † | 8 | 440,377 |
| 2 | Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth <= 18.4 | Percentage of renters (29.3-31] | † | 6 | 488,282 |
| 3 | Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth <= 18.4 | Percentage of renters > 31 | Percentage of persons aged 25+ with a college degree <= 28.1 | 10 | 440,238 |
| 4 | Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth <= 18.4 | Percentage of renters > 31 | Percentage of persons aged 25+ with a college degree > 28.1 | 9 | 448,976 |
| 5 | Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth (18.4-44.3] | Percentage of renters <= 33.6 | Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth <= 21 | 2 | 514,753 |
| 6 | Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth (18.4-44.3] | Percentage of renters <= 33.6 | Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth > 21 | 5 | 426,090 |
| 7 | Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth (18.4-44.3] | Percentage of renters > 33.6 | Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth <= 32.4 | 7 | 465,236 |
| 8 | Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth (18.4-44.3] | Percentage of renters > 33.6 | Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth > 32.4 | 5 | 477,876 |
| 9 | Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth (44.3-54.4] | Percentage of renters <= 37.9 | † | 4 | 457,572 |
| 10 | Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth (44.3-54.4] | Percentage of renters > 37.9 | † | 2 | 457,621 |
| 11 | Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth > 54.4 | Percentage of persons aged 25+ with a college degree <= 15.1 | † | 7 | 443,193 |
| 12 | Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth > 54.4 | Percentage of persons aged 25+ with a college degree > 15.1 | † | 3 | 448,050 |
| Mean | † | † | † | † | 459,022 |
| † 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)