Download an Excel file* of this document: profile_massachusetts__somerville_city.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? ** |
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|---|---|---|---|---|---|---|---|---|
| Value | MOE(+/-) | Value | MOE(+/-) | Value | Value | MOE(+/-) | ||
| Total Persons 1 | 77,478 | -- | 75,981 | 57 | 75,754 | 76,381 | 29 | -- |
| Persons in Households 2 | 74,956 | 236 | 73,329 | -- | 73,485 | 73,202 | -- | -- |
| Total Households 3 | 31,535 | 144 | 30,696 | 1,121 | 32,105 | 31,630 | 780 | No |
| Average Number of Persons per Household 4 | 2.38 | 0.03 | 2.39 | 0.08 | 2.29 | 2.31 | 0.06 | Yes |
| Average Household Income 5 | $56,985 | $1,320 | $74,600 | $4,310 | -- | $76,709 | $3,496 | Yes |
| Average Number of Vehicles per Household 6 | 1.19 | 0.03 | 1.17 | 0.07 | -- | 1.11 | 0.06 | Yes |
| Percent of Persons in Poverty 7 | 12.50 | 0.60 | 13.00 | 2.03 | -- | 17.70 | 2.28 | Yes |
| Percent Minority 8 | 23.00 | 0.70 | 23.30 | 2.66 | 26.10 | 24.30 | 2.52 | No |
| Percent of Persons 65 and Over 9 | 10.40 | 0.50 | 9.30 | 0.92 | 9.10 | 8.40 | 0.82 | Yes |
| Percent of Persons Foreign Born 10 | 29.30 | 0.80 | 26.60 | 2.27 | -- | 24.20 | 1.94 | Yes |
| Total Workers at Place of Residence11 | 45,995 | 654 | 47,880 | 2,353 | -- | 46,034 | 1,490 | No |
| 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? ** |
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|---|---|---|---|---|---|---|---|---|---|---|
| Number | Percent | MOE(+/-)* | Number | Percent | MOE(+/-)* | Number | Percent | MOE(+/-)* | ||
| Total Workers | 44,975 | 100.0 | 657 | 47,560 | 100.0 | 1,349 | 45,145 | 100.0 | 1,459 | No |
| Drove alone | 20,365 | 45.3 | 586 | 19,571 | 41.2 | 1,125 | 19,410 | 43.0 | 1,256 | No |
| 2-person Carpool | 3,780 | 8.4 | 287 | 3,190 | 6.7 | 610 | 3,025 | 6.7 | 631 | Yes |
| 3-or-more-person Carpool | 870 | 1.9 | 140 | 874 | 1.8 | 329 | 845 | 1.9 | 347 | No |
| Transit | 13,025 | 29.0 | 498 | 15,166 | 31.9 | 1,508 | 13,145 | 29.1 | 1,212 | No |
| Bike | 1,250 | 2.8 | 168 | 2,322 | 4.9 | 652 | 1,691 | 3.7 | 321 | Yes |
| Walked | 4,245 | 9.4 | 303 | 4,426 | 9.3 | 745 | 5,090 | 11.3 | 895 | No |
| Taxi, Motorcycle and Other means | 370 | 0.8 | 92 | 435 | 0.9 | 272 | 412 | 0.9 | 243 | No |
| Worked at Home | 1,075 | 2.4 | 156 | 1,576 | 3.3 | 415 | 1,527 | 3.4 | 369 | 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? ** |
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|---|---|---|---|---|---|---|---|---|---|---|
| Number | Percent | MOE(+/-)* | Number | Percent | MOE(+/-)* | Number | Percent | MOE(+/-)* | ||
| At Place of Work | ||||||||||
| Total Workers | 22,955 | 100.0 | 608 | 25,323 | 100.0 | 1,520 | 22,620 | 100.0 | 1,383 | No |
| Drove alone | 14,270 | 62.2 | 516 | 13,885 | 54.8 | 1,226 | 13,579 | 60.0 | 1,051 | No |
| 2-person Carpool | 1,895 | 8.3 | 206 | 2,033 | 8.0 | 463 | 1,354 | 6.0 | 368 | Yes |
| 3-or-more-person Carpool | 445 | 1.9 | 101 | 419 | 1.7 | 206 | 310 | 1.4 | 153 | No |
| Transit | 2,660 | 11.6 | 242 | 4,110 | 16.2 | 750 | 2,535 | 11.2 | 543 | No |
| Bike | 195 | 0.8 | 67 | 751 | 3.0 | 295 | 372 | 1.6 | 159 | Yes |
| Walked | 2,210 | 9.6 | 222 | 2,304 | 9.1 | 490 | 2,562 | 11.3 | 562 | No |
| Taxi, Motorcycle and Other means | 200 | 0.9 | 68 | 245 | 1.0 | 169 | 381 | 1.7 | 205 | No |
| Worked at Home | 1,075 | 4.7 | 156 | 1,576 | 6.2 | 415 | 1,527 | 6.8 | 369 | 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? ** |
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|---|---|---|---|---|---|---|---|
| Minutes | MOE(+/-) | Minutes | MOE(+/-) | Minutes | MOE(+/-) | ||
| At Place of Residence | |||||||
| Total Workers (does not include workers who worked at home) | 27.8 | 0.5 | 28.2 | 1.6 | 28.3 | 1.6 | No |
| Drove alone | 25.4 | 0.6 | 25.4 | 2.6 | 26.3 | 2.6 | No |
| Carpooled | 25.6 | 1.4 | 26.5 | 6.6 | 26.6 | 6.8 | No |
| Transit | 36.4 | 0.9 | 38.0 | 5.5 | 37.9 | 5.2 | No |
| Taxi, Motorcycle, Walk, Bicycle and Other means | 18.8 | 1.1 | 16.2 | 3.3 | 17.3 | 3.8 | No |
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
