Let me tell you a little story. A few friends and I were spinning coins. We
began to notice a trend with one of my new Sacagawea "golden" dollars. It
consistently spun tails, or bird side up, no matter who spun it. Being the
scientifically minded students we are, we set up an experiment.
The following table illustrates our profound results:
Coin
Heads
Tails
Pecent Tails
Trials
Miracle Sacagawea
15
95
86%
110
Ordinary Sacagawea
16
10
38%
26
Ordinary Coin (Kennedy Half-Dollar)
8
6
43%
14
In addition, this coin achieved many tails in a row, as the following chart
shows. Keep in mind that the odds of being dealt a royal flush in poker are
649,739:1, almost 26 times more likely than this coin outcome.
In a row
Odds against
24
16,777,216:1
22
4,194,304:1
15
32,768:1
15
32,768:1
You can read about this coin at the US Mint Web Page.
Here is the coin in all its glory:
