Does developmental placement affect on-time completion?

 
Our first-time, full-time, degree-seeking cohort for fall 2014 was 1,486 students. Within three years, 17.9 percent (266) of those students were awarded a degree or certificate from CCRI. Based on the ACCUPLACER scores of 1,469 of those students, 953 placed in one or more developmental courses. How does this affect on-time completion?