NAEP Technical DocumentationCoefficients of Linear Transformation of the Subscales from the Individual State Calibrating Scale Units to the Combined Calibrating Scale Units, Mathematics State Assessment, by Subscale and Grade: 2015

Coefficients of linear transformation of the subscales from the individual state calibrating scale units to the combined calibrating scale units, mathematics state assessment, by subscale and grade: 2015
Grade	Subscale	A	B
4	Number properties and operations	0.97	0.01
	Measurement	0.93	0.01
	Geometry	0.90	#
	Data analysis, statistics, and probability	0.88	#
	Algebra	0.93	#
8	Number properties and operations	0.93	0.01
	Measurement	0.91	0.01
	Geometry	0.92	0.01
	Data analysis, statistics, and probability	0.90	0.01
	Algebra	0.95	0.01
# Rounds to zero. NOTE: In 2015, grade 12 was not assessed for state. Transformed scale scores below 0 were reset to values of 0, and any transformed scale scores greater than 300 (for grade 12) or 500 (for grades 4 and 8) were set to values of 300 or 500. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2015 Mathematics Assessment.

Last updated 18 November 2021 (ML)