I know that sites have the public percentage and number of bets posted. I've also observed that when the public is on a game over %75 the other way is the way to go. This is just from my short lived gambling observation. Is there any way to find this information?

i.e
70% of public on a game is loses %55 of the time.
%75 of the public on a game it loses 60% of the time.
%80 of the public on a game it loses %75 of the time.

These numbers are made up by me to show an example of the data I'm looking for.