​​​​​NAEP Technical DocumentationStratification for Midwest Metropolitan Noncertainty Primary Sampling Units

The following table provides the definition, number of PSUs, and size of each noncertainty PSU stratum in the Midwest metropolitan primary stratum. Columns 2 through 5 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).

Stratification for Midwest metropolitan noncertainty primary sampling units (PSUs), by stratum: 2022
StratumPrimary stratifierSecondary stratifierTertiary stratifierQuaternary stratifierPSUsMeasure of size
​Total††††916,989,571
1Percentage of female-headed households <= 9.6Percentage of female-headed households <= 8.4††14613,052
2Percentage of female-headed households <= 9.6Percentage of female-headed households > 8.4††15599,573
3Percentage of female-headed households > 9.6Percentage of renters <= 30.6Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth <= 14.2Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth <= 10.114548,336
4Percentage of female-headed households > 9.6Percentage of renters <= 30.6Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth <= 14.2Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth > 10.110567,571
5Percentage of female-headed households > 9.6Percentage of renters <= 30.6Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth > 14.2Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth <= 17.68548,156
6Percentage of female-headed households > 9.6Percentage of renters <= 30.6Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth > 14.2Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth > 17.611552,422
7Percentage of female-headed households > 9.6Percentage of renters (30.6-32.2]Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth <= 16.6Percentage of female-headed households <= 12.16562,849
8Percentage of female-headed households > 9.6Percentage of renters (30.6-32.2]Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth <= 16.6Percentage of female-headed households > 12.13576,197
9Percentage of female-headed households > 9.6Percentage of renters (30.6-32.2]Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth > 16.6Percentage of renters <= 31.82639,144
10Percentage of female-headed households > 9.6Percentage of renters (30.6-32.2]Percentage of Black, Hispanic, American Indian/Alaska Native, or Native Hawaiian/Other Pacific Islander youth > 16.6Percentage of renters > 31.82582,152
11Percentage of female-headed households > 9.6Percentage of renters > 32.2Percentage of female-headed households <= 12.2†4649,462
12Percentage of female-headed households > 9.6Percentage of renters > 32.2Percentage of female-headed households > 12.2†2550,657
Mean†††††582,464
† Not applicable.
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2022 Long-Term Trend Assessment.

Last updated 18 July 2024 (SK)