Do decimal numbers like 6.8 in the Avg. position report in Google Webmaster Tools mean that the URL appeared on page 6 in the 8th position?

If that is true, I am surprised that a searcher would actually go that far into an organic search (e.g., a 6.7 actually got 11 clicks).

What would an even number mean then (e.g., a 17 or 20)?