Table 4:
R clusters’ mean and median values for selected features for each community K = 2. Model R corresponds to Algorithm 1 where we use the sample correlation matrix. Group 1 and 2 are the obtained partitions and , respectively. Population Density is the number of people per sq mile; median household income is in US dollars; % Poverty is the poverty rate: % 1-person households is the percentage of one-person households; % 5 or more person households is the percentage of five or more person households; % households w 60 y/o and older is the percentage of households that have one or more members who are 60 years old or older; low access to stores is defined as living more than one mile (urban areas) or 10 miles (rural areas) from the nearest supermarket, supercenter, or large grocery store; /1,000 is per 1,000 persons; % take public transportation is the percentage of all persons who work in a county and take public transportation to work every day. All feature information is as of 2017.
| Group 1 | Group 2 | |||||
|---|---|---|---|---|---|---|
| Feature | Mean | Median | Std Dev | Mean | Median | Std Dev |
| Population Density | 275.775 | 159.260 | 394.059 | 913.182 | 289.610 | 3659.76 |
| Median Household Income | 54431.6 | 52651.0 | 13386.3 | 58814.6 | 56074.0 | 16737.2 |
| % Poverty | 14.0656 | 13.3000 | 5.71511 | 13.4712 | 12.5000 | 5.83384 |
| % 1-person households | 27.1330 | 27.7185 | 4.21220 | 27.0233 | 27.1978 | 4.54690 |
| % 5 or more person households | 8.91332 | 8.41406 | 2.96792 | 9.38467 | 8.71688 | 3.27316 |
| % households w 60 y/o and older | 39.3294 | 39.1802 | 6.85032 | 38.7538 | 38.6947 | 6.03233 |
| % w low access to stores | 21.8723 | 21.3800 | 9.66507 | 20.8704 | 21.2500 | 9.81211 |
| % low income w low access to stores | 7.48273 | 6.85500 | 4.48466 | 6.60216 | 5.69000 | 4.52299 |
| % households w low access to stores | 2.69416 | 2.32000 | 1.63712 | 2.24196 | 1.92000 | 1.50078 |
| 25 y/o and older w Bachelor’s /1,000 | 110.885 | 106.164 | 40.6371 | 122.654 | 118.332 | 43.6276 |
| % White | 80.8599 | 85.6959 | 15.0719 | 75.7593 | 79.6171 | 16.7522 |
| % Black | 11.3861 | 5.03010 | 14.6140 | 13.4737 | 7.90300 | 15.3919 |
| % Asian | 1.96190 | 1.22070 | 1.89220 | 3.67570 | 1.87900 | 5.28820 |
| No of bars | 29.3313 | 16.0000 | 39.0755 | 55.2143 | 23.5000 | 96.9646 |
| No of grocery stores | 42.5564 | 23.0000 | 67.0810 | 117.321 | 39.0000 | 16.5490 |
| No of restaurants | 13.1345 | 8.00000 | 13.1383 | 14.9219 | 9.00000 | 16.5490 |
| % take public transportation | 0.41130 | 0.19870 | 0.76870 | 1.24690 | 0.32130 | 6.14170 |