Table B-2. Comparisons between frame distribution and base-weighted and final-weighted respondent distributions for public school districts with an indication of potential sources of bias: 2007–08
| New York, enrollment (2,500-5,000 students) | x | x |
| Arizona, locale (rural) | | x |
| State (Nebraska) | | x |
| NOTE: x denotes comparisons that are a potential source of bias. |
| SOURCE: U.S. Department of Education, National Center for Education Statistics, Schools and Staffing Survey (SASS), "Public School District Data File," 2007–08. |