State the average median SAT value for institutes in the state with the most male graduate cohort in 2013.
median SAT value refers to med_sat_value; average = AVG(med_sat_value); male refers to gender = 'M'; graduate cohort refers to grad_cohort; most male graduate cohort refers to MAX(COUNT(grad_cohort WHERE gender = 'M')); in 2013 refers to year = 2013;
SELECT AVG(T1.med_sat_value) FROM institution_details AS T1 INNER JOIN state_sector_grads AS T2 ON T1.state = T2.state WHERE T2.year = 2013 AND T2.gender = 'M' GROUP BY T2.grad_cohort ORDER BY COUNT(T2.grad_cohort) DESC LIMIT 1