Simple coin tossing experiments can help you to understand random phenomena and statistical procedures. When doing statistics for real, you are having to disentangle some underlying effect (say the ease of use of an interface) from effectively random or interfering effects (such as the different levels of skill of your participants). This is difficult. With coin tossing you know the coins are unbiased, 50:50 heads:tails, and hence any odd effects you see are purely due to randomness. The number of heads or tails when you toss a fixed number of coins follow the Binomial distribution.

Used on pages 5, 19, 21, 32, 37, 38, 39, 47, 48, 49, 52, 53, 63, 65, 67, 69, 88, 89, 90, 92

Also known as coin tosses, tossing coins

### Links:

- alandix.com: Two Horse Races
- alandix.com: More Coin Tossing