Table 10. Measures of Error for County Estimates by Use of Pairs of Ratio-Correlation Variables Source: U.S. Bureau of the Census Internet Release date: June 20, 1997 ----------------------------------------------------------------------------------------------------------------- | | | MEASURES OF DIFFERENCE | | |------------------------------------------------------------------------------- | | | Mean Algebraic | Mean Absolute | | | Number | Number | Percent Error | Percent Error | Median | 90th Percentile | of | of |-------------------|-------------------|-------------------|------------------- Variables | States | Counties | With | Without | With | Without | With | Without | With | Without ----------------------------------------------------------------------------------------------------------------- Sch & IRS 25 1447 1.8 2.3 3.2 3.9 2.4 3.1 6.6 7.8 Sch & Dea 25 1429 2.2 1.7 3.4 3.6 2.8 2.6 6.9 7.5 Sch & Bir 23 1274 2.0 2.0 3.3 3.7 2.6 2.7 6.7 7.7 Sch & AUT 20 1106 2.1 1.9 3.4 3.5 2.8 2.6 6.8 7.3 Med & Sch 19 971 1.3 2.4 3.2 3.7 2.5 2.8 6.6 7.4 Med & IRS 18 970 2.3 1.8 3.6 3.4 3.0 2.6 7.2 7.1 Med & Dea 17 886 1.9 2.0 3.2 3.7 2.6 2.8 6.4 7.6 Med & Bir 16 843 1.6 2.2 3.3 3.6 2.5 2.8 6.7 7.3 Med & AUT 15 895 2.2 1.9 3.5 3.5 2.8 2.6 6.9 7.2 IRS & AUT 14 753 1.9 2.0 3.4 3.5 2.8 2.6 6.7 7.3 Dea & IRS 14 1121 1.9 2.0 3.2 3.7 2.4 2.9 6.7 7.5 Dea & AUT 13 971 1.9 2.0 3.0 3.8 2.4 2.9 6.3 7.7 Bir & IRS 10 731 2.0 2.0 3.2 3.6 2.6 2.7 6.8 7.2 Bir & Dea 7 561 2.1 2.0 3.5 3.5 3.0 2.6 7.0 7.1 Bir & AUT 6 530 1.3 2.2 3.1 3.6 2.4 2.8 6.5 7.2 ----------------------------------------------------------------------------------------------------------------- (Sch=School Enrollment, IRS=IRS Returns, Dea=Deaths, Bir=Births, AUT=Auto Registration, Med=Medicare Enrollment)