What is the average number of Byes for the team that had 15 Losses, and less than 1 Win?
CREATE TABLE "2001_ladder" (
  "ballarat_fl" text,
  "wins" real,
  "byes" real,
  "losses" real,
  "draws" real,
  "against" real
);
SELECT AVG("byes") FROM "2001_ladder" WHERE "losses"=15 AND "wins"<1;