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Table 4 Descriptive statistics for supermarket access, 2005

From: Mapping the evolution of 'food deserts' in a Canadian city: Supermarket accessibility in London, Ontario, 1961–2005

  Number of supermarkets within 1000 m Nearest supermarket (metres) % population with access 1000 m % population with bus access
Low Distress     
Mean 0.31 1294 30.3% 81.6%
Median 0.24 1209 25.6% 79.5%
Std. Deviation 0.26 430 23.7% 15.7%
Variance 0.07 184470 5.6% 2.5%
Percentiles  
   5 0.00 681 0.0% 44.7%
   10 0.01 768 0.0% 59.8%
   25 0.11 983 10.4% 73.2%
   50 0.24 1209 25.6% 79.5%
   75 0.41 1495 49.2% 98.9%
   90 0.70 2100 66.7% 99.8%
   95 0.96 2204 78.3% 100.0%
Moderate Distress     
Mean 0.24 1280 27.5% 79.9%
Median 0.11 1304 19.2% 87.7%
Std. Deviation 0.29 496 27.4% 22.3%
Variance 0.08 246379 7.5% 5.0%
Percentiles  
   5 0.00 468 0.0% 24.8%
   10 0.00 648 0.0% 41.5%
   25 0.00 830 4.6% 67.6%
   50 0.11 1304 19.2% 87.7%
   75 0.45 1553 45.8% 98.1%
   90 0.78 1593 70.8% 99.9%
   95 0.80 2447 90.1% 100.0%
High Distress     
Mean 0.26 1347 23.8% 86.4%
Median 0.07 1261 23.3% 91.5%
Std. Deviation 0.36 431 24.7% 14.1%
Variance 0.13 186169 6.1% 2.0%
Percentiles  
   5 0.00 613 0.0% 45.8%
   10 0.00 808 0.0% 71.6%
   25 0.00 1042 0.0% 76.1%
   50 0.07 1261 23.3% 91.5%
   75 0.34 1664 33.5% 96.8%
   90 0.95 1976 58.4% 99.2%
   95 1.26 2137 89.2% 99.9%