CREATE TABLE table_36930 ("Name" CLOB, "GP-GS" CLOB, "Effic" FLOAT, "Cmp-Att-Int" CLOB, "Avg/G" FLOAT)

Which Effic is the average one that has an Avg/G larger than 3.7, and a GP-GS of 13, and a Cmp-Att-Int of 318-521-15?
SELECT AVG("Effic") FROM table_36930 WHERE "Avg/G" > '3.7' AND "GP-GS" = '13' AND "Cmp-Att-Int" = '318-521-15'
SELECT AVG("Effic") FROM "table_36930" WHERE "Avg/G" > '3.7' AND "Cmp-Att-Int" = '318-521-15' AND "GP-GS" = '13'