NAEP Technical Documentation Summary Item Response Rates, Mathematics Combined National and State Assessment, by Item Type and Grade: 2017

Summary item response rates, mathematics combined national and state assessment, by item type and grade: 2017

Grade	Statistic	Multiple-choice items	Dichotomous constructed-response items	Polytomous constructed-response items
4	Number of items	104	36	49
	Average percent missing 1	7.35	9.20	8.96
	Minimum	2.35	1.06	1.34
	Maximum	28.81	32.71	36.10
	Average percent off-task 2	†	0.19	0.06
	Minimum	†	#	#
	Maximum	†	1.14	0.93
	Average weighted percent correct	54.51	43.52	33.55
8	Number of items	105	42	42
	Average percent missing 1	4.71	5.87	6.66
	Minimum	0.52	0.33	0.45
	Maximum	21.82	26.06	22.08
	Average percent off-task 2	†	0.36	0.19
	Minimum	†	#	#
	Maximum	†	2.68	1.77
	Average weighted percent correct	48.46	45.34	36.22
† Not applicable. # Rounds to zero. 1 Missing responses include the categories "omitted" and "not-reached." 2 An "off-task" response (constructed-response items only) is a response that is unrelated to the question. NOTE: The item counts in this table include component items only. Cluster items are not included in the counts. In 2017, grade 12 was not assessed. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2017 Mathematics Assessment.

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