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NAEP Technical DocumentationPrimary Sampling Unit (PSU) Generation: Certainty PSUs for the 2006 Assessment
Any primary sampling unit (PSU) was defined as a certainty PSU if it had 500,000 or more youths. The estimated number of youths is the number of persons age 17 or under from the 2003 U.S. Census Bureau's Population Estimates Program.1 These PSUs were so large that a sample of schools was taken from all of them (rather than from only some of them). There were two exceptions to the 500,000 cutoff. The Honolulu, Hawaii and Washington, D.C. PSUs were included as certainties by design. A total of 29 PSUs were classified as certainties in the 2006 frame. The table below provides a listing of the certainty PSUs.
| PSU | Metropolitan Statistical Area (MSA) | State | Number of counties |
Number of youths |
|---|---|---|---|---|
| Grand total | 203 | 29,969,805 | ||
| Total Northeast | 40 | 6,907,180 | ||
| 1–1 | Boston-Cambridge-Quincy | MA | 5 | 929,867 |
| 1–2 | New York-Northern New Jersey-Long Island | NJ-PA | 13 | 1,579,191 |
| 1–3 | New York-Northern New Jersey-Long Island | NY | 10 | 2,933,093 |
| 1–4 | Pittsburgh | PA | 7 | 517,631 |
| 1–5 | Philadelphia-Camden-Wilmington | PA | 5 | 947,398 |
| Total Midwest | 40 | 5,232,306 | ||
| 2–1 | Chicago-Naperville-Joliet | IL | 9 | 2,249,472 |
| 2–2 | Detroit-Warren-Livonia | MI | 6 | 1,163,068 |
| 2–3 | Minneapolis-St. Paul-Bloomington | MN | 11 | 765,318 |
| 2–4 | St. Louis MO-Il | MO | 9 | 526,692 |
| 2–5 | Cleveland-Elyria-Mentor OH | OH | 5 | 527,756 |
| Total South | 93 | 8,534,382 | ||
| 3–1 | Washington-Arlington-Alexandria | DC | 1 | 108,403 |
| 3–2 | Tampa-St. Petersburg-Clearwater | FL | 4 | 569,333 |
| 3–3 | Miami-Fort Lauderdale-Miami Beach | FL | 3 | 1,262,212 |
| 3–4 | Atlanta-Sandy Springs-Marietta | GA | 28 | 1,232,732 |
| 3–5 | Washington-Arlington-Alexandria | MD | 5 | 568,800 |
| 3–6 | Baltimore-Towson | MD | 7 | 646,729 |
| 3–7 | San Antonio | TX | 8 | 511,008 |
| 3–8 | Houston-Sugar Land-Baytown | TX | 10 | 1,462,521 |
| 3–9 | Dallas-Fort Worth-Arlington | TX | 12 | 1,582,935 |
| 3–10 | Washington-Arlington-Alexandria | VA | 15 | 589,709 |
| Total West | 30 | 9,295,937 | ||
| 4–1 | Phoenix-Mesa-Scottsdale | AZ | 2 | 997,240 |
| 4–2 | Sacramento-Arden-Arcade-Roseville | CA | 4 | 510,956 |
| 4–3 | San Diego-Carlsbad-San Marcos | CA | 1 | 748,944 |
| 4–4 | San Francisco-Oakland-Fremont | CA | 5 | 935,424 |
| 4–5 | Riverside-San Bernardino-Ontario | CA | 2 | 1,081,259 |
| 4–6 | Los Angeles-Long Beach-Santa Ana | CA | 2 | 3,477,216 |
| 4–7 | Denver-Aurora | CO | 10 | 594,262 |
| 4–8 | Honolulu | HI | 1 | 208,191 |
| 4–9 | Seattle-Tacoma-Bellevue | WA | 3 | 742,445 |
| SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2006. | ||||
1 The U.S. Census Bureau's Population Estimates Program (www.Census.gov/popest/estimates.html) yearly publishes total resident population estimates by demographics such as age, sex, race, and Hispanic origin for the nation, states, and counties.
Last updated 13 April 2010 (GF)
