CREATE TABLE table_10434 ("Tie no" FLOAT, "Home team" TEXT, "Score" TEXT, "Away team" TEXT, "Attendance" FLOAT)

what is the average tie no when the home team is stamford a.f.c.?
SELECT AVG("Tie no") FROM table_10434 WHERE "Home team" = 'stamford a.f.c.'
SELECT AVG("Tie no") FROM "table_10434" WHERE "Home team" = 'stamford a.f.c.'