A gaming device with three or more reels which spin when a button is
pushed or a handle is pulled.
Operation of Slot Machines
Slots machines contain a micro-computer “random number generator” (RNG)
that constantly produces numbers, even while the machine is not in use.
Pulling the handle or pushing the “Spin” button only begins the spinning
of the wheels, which is purely for show. This action displays the reel
positions that coordinate with the set of random numbers that were
generated when you pushed “Spin” or pulled the handle.
A typical three-wheel machine could produce 27,000 possible results when
played. Partial payouts will be the majority of results because there is
only a 1 in 27,000 chance that the machine’s jackpot will be generated.
However, the combination of numbers that coincide with this 1 in 27,000
jackpot may be produced frequently because of the RNG. When playing slot
machines, remember that every play is random; one pull is completely
independent of the previous or succeeding pull. Everything comes down to
precisely when you push “Spin” or pull the handle. A completely
different result can be yielded just by playing 1/100 of a second later.
The Department inspects machine software, electronic monitoring systems
and casino records to ensure correct operation and disbursement of
required payout percentage. All gaming software and electronic slot
monitoring systems are tested by an independent testing lab before the
machines can even be shipped to Arizona. The independent lab confirms
the games are uncorrupted and meet Arizona’s strict gaming standards.
After the machines are in play, the Department randomly inspects gaming
devices at each of Arizona’s Indian gaming facilities on a regular
basis. The Department conducts on-site inspections and reviews casino
records to ensure the software operating in casino slot machines is
identical to the software design that was tested and certified by the
independent testing lab. The Department’s Machine Compliance Technicians
randomly select and test machines during unannounced spot checks at 8 to
10 casinos each month.
Odds of Winning
During the expected lifetime of a gaming device the Tribal-State Gaming
Compact requires that each game shall theoretically pay out a minimum of
80% for games requiring no skill, such as slot machines; 83% for games
requiring some skill, such as video poker; and 75% for keno video games.
The highest single advertised award on each gaming device shall occur
statistically at least once in every 50,000,000 plays.
Arizona Tribal-State Compacts
Under the Arizona Tribal-State Compacts a maximum of 18,158 slot
machines are allowed in the State, including Transfer Agreements (Tribes
with Compacts may transfer their slot machines to other recognized
tribes, allowing those that do not have casinos, or that are located in
remote areas, to receive gaming revenue). Currently there are about
15,000 slot machines in operation. The maximum number of slot machines
allowed in any casino is 1,301, and there is a wager limit of $29 per
play for most tribes.