Fig 5. Mean count within 0.25 miles (1,320 ft) of food facilities from school, race and poverty interactions, 2013.

We conducted joint F-test with school level clustered errors suggests significant differences among income and race groups (p<0.05). And pair-wise T-tests for multiple comparisons based on Bonferroni correction (28 pairs in total, with each pair tested on all four food outlets, separately). More often than not, the T-test indicated no statistically significant difference. S21 Table presents test results (p-values) for each pair.