Download an Excel file* of this document: profile_michigan__washtenaw_county.xls.
| Table 1. Selected Characteristics | Census 2000 | 2007-2009 ACS | 2010 Census | 2010-2012 ACS | Is the numeric change between Census 2000 and 2010-2012 ACS Significant? ** |
|||
|---|---|---|---|---|---|---|---|---|
| Value | MOE(+/-) | Value | MOE(+/-) | Value | Value | MOE(+/-) | ||
| Total Persons 1 | 322,895 | -- | 346,712 | -- | 344,791 | 348,311 | -- | -- |
| Persons in Households 2 | 301,566 | 571 | 322,048 | -- | 326,979 | 329,325 | -- | -- |
| Total Households 3 | 125,465 | 296 | 134,190 | 2,086 | 137,193 | 134,570 | 1,363 | Yes |
| Average Number of Persons per Household 4 | 2.40 | 0.01 | 2.40 | 0.02 | 2.38 | 2.45 | 0.02 | Yes |
| Average Household Income 5 | $68,535 | $692 | $77,724 | $2,003 | -- | $79,863 | $1,690 | Yes |
| Average Number of Vehicles per Household 6 | 1.72 | 0.01 | 1.79 | 0.04 | -- | 1.70 | 0.03 | No |
| Percent of Persons in Poverty 7 | 11.10 | 0.20 | 14.40 | 0.83 | -- | 15.40 | 0.95 | Yes |
| Percent Minority 8 | 22.40 | 0.30 | 23.80 | 0.23 | 25.50 | 25.60 | 0.23 | Yes |
| Percent of Persons 65 and Over 9 | 8.00 | 0.20 | 9.40 | 0.36 | 10.10 | 10.60 | 0.33 | Yes |
| Percent of Persons Foreign Born 10 | 10.30 | 0.20 | 10.90 | 0.49 | -- | 11.20 | 0.48 | Yes |
| Total Workers at Place of Residence11 | 172,463 | 1,147 | 172,294 | 2,805 | -- | 169,782 | 2,028 | Yes |
| Table 2a. Mode to Work 12 | CTPP2000 | 2007-2009 ACS | 2010-2012 ACS | Is the numeric change between CTPP 2000 and 2010-2012 ACS Significant? ** |
||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Number | Percent | MOE(+/-)* | Number | Percent | MOE(+/-)* | Number | Percent | MOE(+/-)* | ||
| Total Workers | 169,170 | 100.0 | 1,148 | 165,493 | 100.0 | 2,736 | 165,907 | 100.0 | 2,118 | Yes |
| Drove alone | 128,515 | 76.0 | 1,125 | 122,516 | 74.0 | 2,685 | 121,188 | 73.0 | 2,438 | Yes |
| 2-person Carpool | 11,690 | 6.9 | 429 | 11,319 | 6.8 | 1,100 | 10,926 | 6.6 | 932 | No |
| 3-or-more-person Carpool | 2,695 | 1.6 | 209 | 2,283 | 1.4 | 428 | 2,689 | 1.6 | 552 | No |
| Transit | 5,225 | 3.1 | 290 | 6,473 | 3.9 | 760 | 8,061 | 4.9 | 715 | Yes |
| Bike | 1,545 | 0.9 | 159 | 2,033 | 1.2 | 452 | 2,840 | 1.7 | 573 | Yes |
| Walked | 12,445 | 7.4 | 443 | 11,063 | 6.7 | 1,263 | 10,869 | 6.6 | 1,029 | Yes |
| Taxi, Motorcycle and Other means | 1,060 | 0.6 | 132 | 1,272 | 0.8 | 316 | 938 | 0.6 | 243 | No |
| Worked at Home | 5,995 | 3.5 | 310 | 8,534 | 5.2 | 739 | 8,396 | 5.1 | 889 | Yes |
| Table 2b. Mode to Work 12 | CTPP2000 | 2007-2009 ACS | 2010-2012 ACS | Is the numeric change between CTPP 2000 and 2010-2012 ACS Significant? ** |
||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Number | Percent | MOE(+/-)* | Number | Percent | MOE(+/-)* | Number | Percent | MOE(+/-)* | ||
| At Place of Work | ||||||||||
| Total Workers | 199,850 | 100.0 | 1,117 | 200,494 | 100.0 | 3,339 | 202,354 | 100.0 | 3,463 | No |
| Drove alone | 154,785 | 77.5 | 1,149 | 153,139 | 76.4 | 3,134 | 152,732 | 75.5 | 3,474 | No |
| 2-person Carpool | 15,310 | 7.7 | 489 | 14,137 | 7.1 | 1,133 | 14,172 | 7.0 | 1,045 | No |
| 3-or-more-person Carpool | 3,305 | 1.7 | 231 | 3,153 | 1.6 | 495 | 3,877 | 1.9 | 658 | No |
| Transit | 5,269 | 2.6 | 291 | 6,804 | 3.4 | 751 | 8,097 | 4.0 | 737 | Yes |
| Bike | 1,530 | 0.8 | 158 | 2,046 | 1.0 | 455 | 2,950 | 1.5 | 583 | Yes |
| Walked | 12,520 | 6.3 | 444 | 11,516 | 5.7 | 1,244 | 10,994 | 5.4 | 1,046 | Yes |
| Taxi, Motorcycle and Other means | 1,135 | 0.6 | 136 | 1,165 | 0.6 | 329 | 1,136 | 0.6 | 372 | No |
| Worked at Home | 5,995 | 3.0 | 310 | 8,534 | 4.3 | 739 | 8,396 | 4.1 | 889 | Yes |
| Table 3. Mean Travel Time by Mode to Work 13 | Census 2000 | 2007-2009 ACS | 2010-2012 ACS | Is the change in travel time between Census 2000 and 2010-2012 ACS Significant? ** |
|||
|---|---|---|---|---|---|---|---|
| Minutes | MOE(+/-) | Minutes | MOE(+/-) | Minutes | MOE(+/-) | ||
| At Place of Residence | |||||||
| Total Workers (does not include workers who worked at home) | 22.2 | 0.2 | 22.9 | 0.7 | 22.8 | 0.6 | No |
| Drove alone | 22.9 | 0.2 | 23.2 | 0.9 | 23.0 | 0.8 | No |
| Carpooled | 22.7 | 0.7 | 23.3 | 3.2 | 23.8 | 3.0 | No |
| Transit | 27.4 | 1.2 | 27.5 | 5.5 | 30.2 | 4.6 | No |
| Taxi, Motorcycle, Walk, Bicycle and Other means | 13.5 | 0.6 | 17.5 | 3.2 | 15.9 | 2.3 | Yes |
Notes:
* The coefficient of variation (CV) can be derived by the standard error (SE) divided by the estimate, while SE = MOE/1.645.
** The z-value of the difference of the two estimates are used to determined if the two estimates are significantly different at 90% confidence level.
1 Census 2000 SF3 Table P1; 2007-2009 ACS Table B01003; 2010-2012 ACS Table B01003
2 Census 2000 SF3 Table P9; 2007-2009 ACS Table B09016; 2010-2012 ACS Table B01003 minus Table B26001
3 Census 2000 SF3 Table P10; 2007-2009 ACS Table B19001; 2010-2012 ACS Table B19001
4 Census 2000 SF3 Table P9 divided Census 2000 SF3 Table P10; 2007-2009 ACS Table B09016 divided 2007-2009 ACS Table B19001; 2010-2012 ACS Table S1101
5 CTPP2000 Table 1-090; 2007-2009 ACS Table B19025; 2010-2012 ACS Table B19025
6 Census 2000 SF3 Table H46; 2007-2009 ACS Table B25046; 2010-2012 ACS Table B25046
7 Census 2000 SF3 Table P87; 2007 -2009 ACS Table B17001; 2010-2012 ACS Table B17001
8 Census 2000 SF3 Table P6; 2007-2009 ACS Table B02001; 2010-2012 ACS Table B02001
9 Census 2000 SF3 Table P8; 2007-2009 ACS Table B01001; 2010-2012 ACS Table B01001
10 Census 2000 SF3 Table P21; 2007-2009 ACS Table B06003; 2010-2012 ACS Table B06003
11 Census 2000 SF3 Table P43; 2007-2009 ACS Table B23001; 2010-2012 ACS Table B23025
12 Residence place information is from CTPP2000 Table 1-002; 2007- 2009 ACS Table B08301; 2010-2012 ACS Table B08301. Workplace information is from CTPP2000 Table 2-002; 2007-2009 ACS Table B08406; 2010-2012 ACS Table B08601
13 CTPP2000 1-118; 2007-2009 ACS Table C08136; 2010-2012 ACS Table C08136
