How to win at roulette - determining if there is a wheel bias with chi-squared test calculator
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Your recorded frequencies for individual numbers (how many times did the number spun during your observation):Write your numbers belowSquared diffs (the differences beetween the expected frequency and your observed frequencies, squared)The chi-square test tells you, if the frequencies in your sample are statistically different from the ones that would have came up if the spins were perfectly random.
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10Expected frequency (how many times would a number spin, if the wheel was perfectly random):0
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30Your chi-squared value:#DIV/0!
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40Is there a wheel bias? (with 99% percent accuracy):#DIV/0!
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70Some visual help
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Sum:00
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Chi-squared test for wheel bias