Do casinos publish the odds for the different payouts on their slot machines?

Yes, most slot machines have little computers that are "editable" to change win rates and payouts.

The Slot Guru says:Modern slot machines 'are' computers with configurable software that allow operators (casino techs) to select one of many configurations. Only those configurations that are approved by that jurisdictions regulations (tribal or state) are available for selection.

Normally, games are set once and that's it. Unless the game theme or denomination is being changed, it's not normal to change the configuration.

While the actual process to change the configuration takes only minutes, all of the regulatory and accounting compliance requirements can cause the process to take hours.

It's a common myth that casinos change payout % in the games on a whim. The reality is that there is nothing to be gained by doing this. Whether a game is configured to 90% or 95%, the casino will almost always get the $$$ you walk in the door with. The only real difference is the amount of play time you might get for your $$$.

The bottom line is that you are trading $$$ for time of the game. However, the higher the payout %, the more opportunities you have at hitting the jackpot!

the casino can not tamper with the machine it self . the machine are preset at the factory were they are made