The STANDARD Procedure

Statistical Computations

Standardizing values removes the location and scale attributes from a set of data. The formula to compute standardized values is

[IMAGE]

where

[IMAGE] is a new standardized value

[IMAGE] is the value of STD=

[IMAGE] is the value of MEAN=

[IMAGE] is an observation's value

[IMAGE] is a variable's mean

[IMAGE] is a variable's standard deviation.

PROC STANDARD calculates the mean ( [IMAGE] ) and standard deviation ( [IMAGE] ) from the input data set. The resulting standardized variable has a mean of M and a standard deviation of S.

If the data are normally distributed, standardizing is also studentizing since the resulting data have a Student's t distribution.

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	is a new standardized value
	is the value of STD=
	is the value of MEAN=
	is an observation's value
	is a variable's mean
	is a variable's standard deviation.