[KyleM]

well, lets say that hypothetically you only sat at tables with 7 random players, and 2 players that only pressed "called" (they called to the showdown 100% of the time). your database would should the majority of players as winners, because the majority of players will win at tables with these 2 terrible players. your database will be affected by your table selection, and your own play (if you were a huge loser it would also show an inflated number of winners). also, your sample size could be too small.