(Or "Gaussian distribution") The {frequency distribution} of many natural phenomena such as the height or intelligence of people of a certain age and sex. The formula looks something like: P(x) = e^(((x-m)/s)^2) where P(x) is the probability of a measurement x, m is the mean value of x and s is theef="module.php?name=Lexikon&file=search&eid=1&query=standard deviation">standard deviation. Also known as a "bell curve" because of its shape. (2003-10-25)
