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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 1996 scores and 1996 transformed provisional scores, grade 8 science assessment: 2000

NAEP Technical DocumentationComparison means and percentiles of 1996 scores and 1996 transformed provisional scores, grade 8 science assessment: 2000

Scale	Statistic	Original 1996 estimate	1996 transformed provisional estimate	Difference between the provisional estimate and the original estimate
Composite	Mean	150.00	150.00	0.00
	10th percentile	103.62	103.86	0.24
	25th percentile	128.26	128.05	-0.21
	50th percentile	152.71	152.57	-0.14
	75th percentile	173.62	173.69	0.07
	90th percentile	191.74	192.06	0.32
Physical	Mean	150.00	150.00	0.00
	10th percentile	102.36	102.58	0.22
	25th percentile	127.43	127.35	-0.08
	50th percentile	152.36	152.17	-0.18
	75th percentile	174.51	174.93	0.42
	90th percentile	193.17	193.44	0.27
Earth	Mean	150.00	150.00	0.00
	10th percentile	102.99	102.91	-0.08
	25th percentile	127.29	126.90	-0.39
	50th percentile	152.12	152.34	0.22
	75th percentile	174.40	174.67	0.27
	90th percentile	193.34	193.20	-0.14
Life	Mean	150.00	150.00	0.00
	10th percentile	102.28	102.76	0.48
	25th percentile	127.77	127.58	-0.19
	50th percentile	153.16	152.84	-0.32
	75th percentile	174.26	174.12	-0.13
	90th percentile	193.04	192.67	-0.36
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2000 Science Assessment.

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