Research Article
A Data Quality Control Program for Computer-Assisted Personal Interviews
Table 2
Missing data over the two years of the TREC Project 1.
| Missing rate | Year 1 | Year 2 |
Total (Year 1 + Year 2) | Frequency | Percent | Frequency | Percent | Frequency | Percent | Cumulative percent |
| No missing | 0 | 0 | 1135 | 75.2 | 1135 | 37.8 | 37.9 | 0%~1% | 0 | 0 | 222 | 14.7 | 222 | 7.4 | 45.3 | 1%~2% | 0 | 0 | 95 | 6.3 | 95 | 3.2 | 48.5 | 2%~3% | 1010 | 67.6 | 33 | 2.2 | 1043 | 34.7 | 83.3 | 3%~4% | 381 | 25.5 | 8 | 0.5 | 389 | 13.0 | 96.3 | 4%~5% | 70 | 4.7 | 8 | 0.5 | 78 | 2.6 | 98.9 | 5%~10% | 26 | 1.7 | 3 | 0.2 | 29 | 1.0 | 99.9 | >10% | 6 | 0.4 | 6 | 0.4 | 12 | 0.4 | 100.0 |
| Total | 1493 | 100.0 | 1510 | 100.0 | 3003 | 100.0 | ā |
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