Converting a random variable X with expected value μ and variance σ2 to a random variable Y with expected value 0 and variance 1, using the transformation
The same term is used for the process of converting a data set x1, x2,…, xn, with sample mean x̄ and sample variance s2, into the data set y1, y2,…, yn, with mean 0 and variance 1, by the transformation