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Table 1 Descriptive Statistics

From: Lead exposure and the 2010 achievement test scores of children in New York counties

Variable Mean Standard Deviation Minimum Maximum
Percent scoring at lowest level, ELA grade 3 12.2 2.7 7.1 18.8
Percent scoring at lowest level, ELA grade 8 6.9 1.8 3.2 11.1
Percent scoring at lowest level, math grade 3 8.6 2.5 3.3 15.9
Percent scoring at lowest leve, math grade 8 7.5 2.4 3.8 13.3
Percent with blood lead > 10, 2003-2005 1.69 1.07 0.31 5.3
Percent with blood lead > 10, 2005-2007 1.38 0.89 0.20 4.14
Income, 2004 42,726 9,623 33,791 75,514
Income, 2008 51,095 12,948 39,821 94,856
  1. N = 57 counties for all variables.