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The ideal result should be heads 50% of the time and tails 50% of the time.

99% confidence means you are accepting a 1% error on the ideal.

95% means that you are accepting a 5% error on the ideal.

It would be hard to get within 1% or 5% of the ideal with very few tosses. If you do a few tosses you may actually conclude that the coin is biased even if it's not. I suspect that within 10 or 20 tosses you should seriously approach your ideal 50-50.

by vladimir on Fri Mar 20th, 2009 at 07:39:29 AM EST
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