The process of correcting data to reduce them to the sample scale by subtracting the sample mean and dividing by the standard deviation- options generalization scale transformation standardization variable re – specification

Standardization 

Or to produce the one of the statistical concepts, the z-score. The z-score is yielded when the sample mean deducts the observed sample score and is divided by the standard deviation. This is used to standardize the scale into numbers from or before 0.