Age | 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), 2012 Mathematics Long-Term Trend Assessment. |
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9 | Number of items | 101 | 36 | 0 |
Average percent missing1 | 5.76 | 7.06 | † | |
Minimum | 0.52 | 0.97 | † | |
Maximum | 21.14 | 23.68 | † | |
Average percent off-task2 | † | 0.07 | † | |
Minimum | † | 0.00 | † | |
Maximum | † | 0.38 | † | |
Average weighted percentage correct | 68.61 | 63.45 | † | |
13 | Number of items | 121 | 36 | 0 |
Average percent missing1 | 4.34 | 4.15 | † | |
Minimum | 0.21 | 0.14 | † | |
Maximum | 31.61 | 30.67 | † | |
Average percent off-task2 | † | 0.08 | † | |
Minimum | † | 0.00 | † | |
Maximum | † | 0.49 | † | |
Average weighted percentage correct | 68.85 | 69.23 | † | |
17 | Number of items | 126 | 31 | 0 |
Average percent missing1 | 3.83 | 6.33 | † | |
Minimum | 0.33 | 0.86 | † | |
Maximum | 19.75 | 27.11 | † | |
Average percent off-task2 | † | 0.52 | † | |
Minimum | † | 0.02 | † | |
Maximum | † | 2.36 | † | |
Average weighted percentage correct | 69.80 | 58.89 | † |