More specifically, effect sizes can be interpreted as the new percentile standing of the average control group member if they had been in the treatment group. (americanprogress.org)
Rather, voucher users are exercising private school choice, while control group members are exercising a small amount of private school choice and a substantial amount of public school choice. (educationnext.org)
Forty - five percent of the Hispanic students in the control group enrolled in college within 3 years of expected high school graduation (as compared to just 36 percent of African American control group members). (educationnext.org)