Glossary · lab
p-value
The probability of seeing a deviation at least as large as the one observed if the wheel were fair.
In context
p = 0.05 means a fair wheel would produce this pattern one time in twenty. It is not the probabilitymathProbabilityChance of an outcome, from 0 to 1 or 0% to 100%. One number: 1/37 = 2.70%.Read full → that the wheel is biased.
Did you know
Look at twenty fair wheels and one will show p < 0.05. This is why one significant result is a reason to collect more data, not to bet.