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The following table presents the number of schools selected for the twelfth-grade private school sample by sampling frame (Private School Universe Survey [PSS]-based and new-school) and private school affiliation.
| School type | Total school sample | PSS-based school sample | New-school sample |
|---|---|---|---|
| All private | 460 | 460 | 0 |
| Catholic | 90 | 90 | 0 |
| Non-Catholic private | 350 | 350 | 0 |
| Unknown afffiliation | 30 | 30 | 0 |
| NOTE: Numbers of schools are rounded to nearest ten. Detail may not sum to totals due to rounding. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP),2019 National Mathematics, Reading, and Science Assessments. | |||