The following illustrative summary table for 2000 gives the upper 99.8 percent confidence limit for the error rate for each of the instruments as well as the sampling information. The 99.8 percent confidence limit and the selection rates indicated were chosen to make these results comparable to those of administrations since 1983, all of which used the same parameters. Since this information is not routinely calculated, this table is not available for 2001.
|Instrument||Number of samples||Selection rate||Different booklets||Number of booklets sampled||Number of fields sampled||Number of errors||Observed error rate||Upper 99.8% confidence limit|
|SD/LEP student questionnaires||72,389||1/499||1||145||4,350||10||0.0023||0.0055|
|School characteristics and policies questionnaires||10,612||1/408||3||26||1,583||7||0.0044||0.0122|
|SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2000.|