You configuration looks goods
Now, items with less than 5 stars will displays at the end? Is it correct?
You mean items with 5 or less --votes-- (you do not 5 or less stars ...)
Yes they wll be pushed down towards the end of the list
-- e.g. a 5-times voted item with --real-- rating : 60% will be ordered as if it had rating 48% = ( 60% * 0.8 )
if you want to push them even more to the end of the list,
then set the weight to even lower value , lower than 80% that i gave in my example
e.g.
1 votes, weight 20% (aggressive pushing back)
2 votes, weight 30% (less aggressive pushing back)
3 votes, weight 40% (etc)
4 votes, weight 50%
5 votes, weight 60%
6 votes, weight 100% (no pushing back)
7 votes, weight 100% (no pushing back)