Sample size (or number of clusters) by treatment arms
We expect 650 eligible applicants per cohort. Across four cohorts, this implies a total of 2,600 eligible applicants. Assuming equal assignment across the three study groups, the full sample will include approximately 1,300 students in the control group and 1,300 students in the pooled mentorship treatment group. For comparisons involving each specific treatment arm, we expect approximately 650 students in the mentorship-only arm and 650 students in the mentorship-plus-financial-coaching arm, with the control group comprising 1,300 students.