Characteristics of all NYC public schools by survey participation status, 2009–10 academic year.

aParticipating schools compared to non-participating schools.bChi-square test.cSatterthwaite T-test of Mean Difference, two-sided exact Pr>|t|.*A federal program that provides financial assistance to Local Education Agencies and schools with high numbers or high percentages of poor children.†The percentage of public schools where more than three quarters of students are eligible for free or reduced price lunch.¶Proportion of each ethnic group in schools.