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NAEP Technical DocumentationSummary Response Rates for the NAEP 2010 Civics National Assessment

Summary item response rates, civics national assessment, by item type and grade: 2010

Grade	Statistic	Multiple-choice items	Dichotomous constructed-response items	Polytomous constructed-response items
† Not applicable. 1 Missing responses includes the categories "omitted" and "not-reached." 2 An "off-task" response (constructed-response items only) is a response that is unrelated to the question and is considered inappropriate. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2010 Civics Assessment.
4	Number of items	69	†	22
	Average percent missing1	5.24	†	5.41
	Minimum	0.20	†	0.56
	Maximum	19.54	†	14.02
	Average percent off-task2	†	†	0.15
	Minimum	†	†	0.00
	Maximum	†	†	0.36
	Average weighted proportion correct	58.35	†	43.23
8	Number of items	120	†	32
	Average percent missing1	2.40	†	8.51
	Minimum	0.20	†	2.23
	Maximum	9.80	†	21.50
	Average percent off-task2	†	†	0.76
	Minimum	†	†	0.09
	Maximum	†	†	2.58
	Average weighted proportion correct	55.50	†	36.34
12	Number of items	122	1	30
	Average percent missing1	2.26	2.55	11
	Minimum	0.04	2.55	2.90
	Maximum	8.71	2.55	20.88
	Average percent off-task2	†	0.39	0.92
	Minimum	†	0.39	0.06
	Maximum	†	0.39	3.25
	Average weighted proportion correct	56.38	70.54	38.85

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