Question: What was the average lead maragin for the dates administered of October 6, 2008?
SQL: SELECT AVG("Lead Maragin") FROM "2-16751596-13" WHERE "Dates administered" = 'October 6, 2008';

Question: What was the poll source for October 6, 2008?
SQL: SELECT "Poll Source" FROM "2-16751596-13" WHERE "Dates administered" = 'October 6, 2008';