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NAEP Analysis and Scaling → Scale Linking and Transformation to the Reporting Metric → The Transformation Equation → Comparisons of Distributions of Linking Samples for NAEP Assessments → Comparison means and percentiles of 1994 and 1994 transformed provisional scores, grade 8 U.S. history assessment: 2001
| Scale | Statistic | Original 1994 estimate | 1994 transformed provisional estimate | Difference between the provisional estimate and the original estimate |
|---|---|---|---|---|
| Composite | Mean | 259.27 | 259.27 | 0.00 |
| 10th percentile | 216.74 | 216.76 | 0.02 | |
| 25th percentile | 238.57 | 238.20 | -0.36 | |
| 50th percentile | 260.92 | 260.99 | 0.08 | |
| 75th percentile | 281.76 | 281.92 | 0.17 | |
| 90th percentile | 299.09 | 299.41 | 0.32 | |
| Democracy | Mean | 256.43 | 256.43 | 0.00 |
| 10th percentile | 212.33 | 212.42 | 0.09 | |
| 25th percentile | 234.45 | 234.11 | -0.34 | |
| 50th percentile | 257.72 | 257.41 | -0.32 | |
| 75th percentile | 279.87 | 280.20 | 0.33 | |
| 90th percentile | 298.76 | 299.19 | 0.43 | |
| Cultures | Mean | 263.16 | 263.16 | 0.00 |
| 10th percentile | 220.86 | 220.80 | -0.06 | |
| 25th percentile | 242.64 | 242.31 | -0.33 | |
| 50th percentile | 264.97 | 264.91 | -0.06 | |
| 75th percentile | 285.86 | 285.72 | -0.15 | |
| 90th percentile | 302.77 | 303.11 | 0.34 | |
| Technology | Mean | 258.62 | 258.62 | 0.00 |
| 10th percentile | 216.66 | 216.69 | 0.03 | |
| 25th percentile | 238.90 | 238.58 | -0.33 | |
| 50th percentile | 261.07 | 260.98 | -0.10 | |
| 75th percentile | 280.47 | 280.71 | 0.23 | |
| 90th percentile | 297.27 | 297.12 | -0.15 | |
| World role | Mean | 258.33 | 258.33 | 0.00 |
| 10th percentile | 209.22 | 209.32 | 0.09 | |
| 25th percentile | 234.17 | 233.37 | -0.80 | |
| 50th percentile | 260.26 | 259.67 | -0.59 | |
| 75th percentile | 284.30 | 284.75 | 0.45 | |
| 90th percentile | 304.68 | 305.08 | 0.41 | |
| SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2001. | ||||
Last updated 17 April 2008 (TS)
