Table 2.
Comparison of tract estimates between area+population and area-only interpolation
| Size of discrepancy | |||||||
|---|---|---|---|---|---|---|---|
| Mean | SD | r | <0.1 SD | .1-.5 SD | .5-1.0 SD | >1.0 SD | |
| Splits: 2000-2010 (n=12,567) | |||||||
| Population count | 3,489 | 1,548 | 0.511 | 10.7% | 34.3% | 25.3% | 29.7% |
| Non-Hispanic white count | 2,426 | 1,420 | 0.681 | 18.8% | 37.5% | 22.5% | 21.2% |
| Non-Hispanic Asian count | 151 | 295 | 0.893 | 66.6% | 25.5% | 5.0% | 2.9% |
| College graduate count | 600 | 485 | 0.783 | 26.4% | 44.3% | 18.0% | 11.3% |
| Homeowner count | 880 | 479 | 0.634 | 16.3% | 37.3% | 23.2% | 23.2% |
| Population density | 1,689 | 4,722 | 0.926 | 79.2% | 18.0% | 1.9% | 1.0% |
| Non-Hispanic white % | 71.1 | 26.1 | 0.996 | 99.3% | 0.4% | 0.1% | 0.1% |
| Non-Hispanic Asian % | 4.1 | 7.1 | 0.987 | 99.2% | 0.6% | 0.2% | 0.1% |
| College graduate % | 26.6 | 16.3 | 0.997 | 99.0% | 0.6% | 0.2% | 0.1% |
| Homeowner % | 69.4 | 22.2 | 0.996 | 99.0% | 0.6% | 0.2% | 0.2% |
| Median household income | $48,857 | $18,736 | 0.999 | 99.1% | 0.6% | 0.2% | 0.1% |
| Many to many 2000-2010 (n=9106) | |||||||
| Population count | 3,601 | 1,819 | 0.788 | 53.1% | 24.8% | 10.8% | 11.3% |
| Non-Hispanic white count | 2,382 | 1,680 | 0.874 | 61.3% | 22.3% | 9.4% | 7.0% |
| Non-Hispanic Asian count | 201 | 494 | 0.918 | 85.1% | 12.5% | 1.6% | 0.9% |
| College graduate count | 609 | 577 | 0.882 | 65.8% | 22.3% | 7.4% | 4.5% |
| Homeowner count | 850 | 544 | 0.860 | 59.5% | 22.8% | 10.0% | 7.7% |
| Population density | 2,078 | 4,514 | 0.949 | 85.8% | 11.6% | 1.8% | 0.8% |
| Non-Hispanic white % | 66.7 | 30.4 | 0.993 | 96.9% | 2.6% | 0.3% | 0.2% |
| Non-Hispanic Asian % | 5.2 | 10.4 | 0.979 | 97.4% | 2.2% | 0.2% | 0.2% |
| College graduate % | 25.8 | 17.6 | 0.991 | 95.6% | 3.4% | 0.6% | 0.3% |
| Homeowner % | 64.5 | 24.8 | 0.992 | 94.7% | 4.3% | 0.6% | 0.4% |
| Median household income | $47,500 | $21,605 | 0.996 | 95.8% | 3.4% | 0.6% | 0.2% |
| All tracts 2000-2010 (n=72,739) | |||||||
| Population count | 3,871 | 1,602 | 0.883 | 78.3% | 9.3% | 5.8% | 6.6% |
| Non-Hispanic white count | 2,676 | 1,618 | 0.932 | 81.3% | 9.8% | 5.0% | 3.9% |
| Non-Hispanic Asian count | 164 | 375 | 0.971 | 92.8% | 5.7% | 1.0% | 0.5% |
| College graduate count | 612 | 556 | 0.947 | 83.4% | 10.6% | 3.9% | 2.1% |
| Homeowner count | 960 | 514 | 0.917 | 80.4% | 9.6% | 5.2% | 4.8% |
| Population density | 1988 | 4549 | 0.983 | 94.5% | 4.7% | 0.6% | 0.3% |
| Non-Hispanic white % | 69.4 | 29.6 | 0.998 | 99.5% | 0.4% | 0.1% | 0.0% |
| Non-Hispanic Asian % | 4.0 | 8.1 | 0.994 | 99.5% | 0.4% | 0.1% | 0.0% |
| College graduate % | 23.8 | 16.9 | 0.998 | 99.3% | 0.6% | 0.1% | 0.1% |
| Homeowner % | 66.5 | 22.7 | 0.998 | 99.1% | 0.7% | 0.1% | 0.1% |
| Median household income | $ 45,158 | $ 20,492 | 0.999 | 99.3% | 0.6% | 0.1% | 0.0% |