NAEP Technical DocumentationConditional Correlations and Residual Variances of the Subscales, Mathematics Combined National and State Assessment, by Subscale and Grade: 2015

Conditional correlations and residual variances of the subscales, mathematics combined national and state assessment, by subscale and grade: 2015

Grade	Subscale	Number properties and operations	Measurement	Geometry	Data analysis, statistics, and probability	Algebra
4	Number properties and operations	1.00	§	§	§	§
	Measurement	.89	1.00	§	§	§
	Geometry	.82	.88	1.00	§	§
	Data analysis, statistics, and probability	.92	.91	.87	1.00	§
	Algebra	.89	.87	.83	.90	1.00
	Residual variance	.43	.44	.44	.43	.47
8	Number properties and operations	1.00	§	§	§	§
	Measurement	.93	1.00	§	§	§
	Geometry	.90	.92	1.00	§	§
	Data analysis, statistics, and probability	.94	.90	.86	1.00	§
	Algebra	.94	.91	.88	.92	1.00
	Residual variance	.37	.39	.41	.39	.33
12	Number properties and operations	1.00	§		§	§
	Measurement and geometry	.87	1.00		§	§
	Data analysis, statistics, and probability	.87	.91		1.00	§
	Algebra	.89	.92		.88	1.00
	Residual variance	.29	.26		.28	.23
§ These cells do not display data because this is a correlation matrix. Information is shown for the lower triangle only to eliminate redundant information. NOTE: Since 2005, measurement and geometry are 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), 2015 Mathematics Assessment.

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