Standard Score

A variable is standardized if it has a mean of 0 and a standard deviation of 1. The transformation from a raw score X to a standard score can be done using the following formula:

Xstandardized = (X - μ)/σ

where μ is the mean and σ is the standard deviation. Transforming a variable in this way is called "standardizing" the variable. It should be kept in mind that if X is not normally distributed then the transformed variable will not be normally distributed either.

See also: Z score