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Also note that I did not take a very big sample. It often requires many thousands of trials to prove a discrepancy: the fact I could show cheating with less than 250 is very telling.
Had I wanted to lose any more money, and got the same results proportion of wins over a sample twice the size, the odds that this is fair would go from 136,000-1 (such that you would expect to find such a run once in about ever 50 million 4-line hands, roughly equivalent to playing video poker 400 hands/hr, 8 hours a day for 40 years), to 3 billion - 1.
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