NAEP tdw - Comparison of Means and Percentiles of 2009 Scores and 2009 Transformed Provisional Scores, Grade 12 Mathematics Combined National and State Assessment, by Scale: 2013

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NAEP Analysis and Scaling → Scale Linking and Transformation to the Reporting Metric → Comparisons of Distributions of Linking Samples for NAEP Assessments → Comparison of Means and Percentiles of 2009 Scores and 2009 Transformed Provisional Scores, Grade 12 Mathematics Combined National and State Assessment, by Scale: 2013

Original estimates are based on previous assessment data and previous assessment scaling results, transformed to the reporting metric using the transformation identified during the analysis of the previous assessment data. Provisional estimates are based on previous assessment data and current assessment scaling results. These are on the theta metric specified by the scaling program. The original and provisional estimates for the linking sample are used to find the transformation constants necessary to place the current assessment scale scores on the scale used to report previous assessment scale scores. The transformed provisional estimates are based on previous assessment data and current assessment scaling results, transformed to the reporting metric using the transformation constants calculated from the original and provisional estimates for the linking sample. If the transformation constants are correct, the original and transformed provisional means should be the same.

NAEP Technical DocumentationComparison of means and percentiles of 2009 scores and 2009 transformed provisional scores, grade 12 mathematics combined national and state assessment, by scale: 2013
Scale	Statistics	Original 2009 estimate	2009-transformed provisional estimate	Difference between the provisional estimate and the original estimate
# Rounds to zero. NOTE: In 2013 measurement and geometry were combined at grade 12. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2013 Mathematics Assessment.
Composite scale	Mean	153.31	153.31	#
	10th percentile	109.63	109.52	-0.11
	25th percentile	130.12	129.76	-0.36
	50th percentile	153.80	153.40	-0.40
	75th percentile	176.96	177.04	0.08
	90th percentile	196.56	197.29	0.73
Number properties and operations	Mean	150.69	150.69	#
	10th percentile	105.45	105.62	0.17
	25th percentile	127.98	127.03	-0.95
	50th percentile	152.38	151.21	-1.17
	75th percentile	175.07	174.90	-0.17
	90th percentile	194.15	195.43	1.28
Measurement and geometry	Mean	153.43	153.43	#
	10th percentile	110.01	110.08	0.07
	25th percentile	130.70	130.47	-0.23
	50th percentile	154.15	153.92	-0.23
	75th percentile	177.00	177.04	0.04
	90th percentile	196.20	196.42	0.22
Data analysis, statistics, and probability	Mean	152.44	152.44	#
	10th percentile	105.29	105.32	0.03
	25th percentile	127.91	127.57	-0.34
	50th percentile	153.38	153.01	-0.37
	75th percentile	177.63	177.73	0.10
	90th percentile	198.57	198.98	0.41
Algebra	Mean	154.56	154.56	#
	10th percentile	110.53	110.76	0.23
	25th percentile	130.56	130.28	-0.28
	50th percentile	154.57	154.14	-0.43
	75th percentile	178.51	178.42	-0.09
	90th percentile	199.24	199.69	0.45

Last updated 21 May 2017 (DC)

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