Table: us_senate_poll_2008_6
Columns: poll_source
dates_administered
democrat_mark_begich
republican_ted_stevens
lead_maragin

Question: What was the average lead maragin for the dates administered of october 6, 2008?
SQL: SELECT AVG("lead_maragin") FROM us_senate_poll_2008_6 WHERE "dates_administered" = 'october 6, 2008'

Question: What was the poll source for october 6, 2008?
SQL: SELECT "poll_source" FROM us_senate_poll_2008_6 WHERE "dates_administered" = 'october 6, 2008'