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NAEP Technical DocumentationSummary Response Rates for the NAEP 2006 Economics Assessment

The table below provides relevant summary statistics for the 2006 economics assessment which was only given at grade 12.

Number of items, economics assessment, by item type and grade: 2006

Grade	Statistic	Multiple-choice items	Dichotomous items	Polytomous items
† Not applicable. 1 Missing 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), 2006 Economics Assessment.
12	Average weighted number of responses	2300.20	2327.90	2293.20
	Number of items	155	3	29
	Average percentage missing1	1.38	7.38	9.75
	Minimum	0.38	2.96	2.49
	Maximum	3.82	12.11	27.06
	Average percentage off-task2	†	0.67	0.71
	Minimum	†	0.40	0.22
	Maximum	†	0.86	1.39
	Average weighted percentage correct	55.06	46.10	41.80

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