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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 provisional 1994 transformed scores, grade 4 geography assessment: 2001

NAEP Technical DocumentationComparison means and percentiles of 1994 and provisional 1994 transformed scores, grade 4 geography assessment: 2001

Scale	Statistic	Original 1994 estimate	Provisional 1994 transformed estimate	Difference between the provisional estimate and the original estimate
Composite	Mean	205.74	205.74	0.00
	10th percentile	145.62	145.83	0.21
	25th percentile	178.83	179.08	0.25
	50th percentile	211.05	211.23	0.18
	75th percentile	237.20	237.05	-0.14
	90th percentile	257.40	257.41	0.01
Space and place	Mean	208.03	208.03	0.00
	10th percentile	147.80	147.71	-0.09
	25th percentile	181.32	180.65	-0.67
	50th percentile	212.86	212.63	-0.23
	75th percentile	239.69	239.77	0.08
	90th percentile	260.74	261.39	0.65
Environment and society	Mean	204.16	204.16	0.00
	10th percentile	137.77	137.51	-0.26
	25th percentile	174.90	174.56	-0.34
	50th percentile	210.36	210.24	-0.13
	75th percentile	238.64	238.87	0.23
	90th percentile	261.27	261.21	-0.06
Spatial dynamics and connections	Mean	204.25	204.25	0.00
	10th percentile	146.84	147.09	0.25
	25th percentile	178.31	178.15	-0.16
	50th percentile	208.79	208.75	-0.05
	75th percentile	234.11	234.04	-0.07
	90th percentile	254.44	254.59	0.14
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2001 Geography Assessment.

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