This is the normal
density curve defined by a
mean of 0 and
standard deviation of 1, also called the standardized normal curve. A formula for generating the density curve is:
P=(
e^(-(x^2)/2))/sqrt(2*
pi)
To determine the probability of an event in a normally distributed set of data of occuring, integrate this function from -infinity to (x-mu)/sigma where mu is the mean and sigma is the standard deviation.