CREATE TABLE table_11948 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What was the attendance when St Kilda played as the away team?
SELECT AVG("Crowd") FROM table_11948 WHERE "Away team" = 'st kilda'
SELECT AVG("Crowd") FROM "table_11948" WHERE "Away team" = 'st kilda'