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| The STANDARD Procedure |
Statistical Computations: STANDARD Procedure
Standardizing values removes the location and scale attributes from a set of data. The formula to compute standardized values is
![[equation]](images/deqn29.gif)
![[equation]](images/leqn111.gif) |
is a new standardized value |
![[equation]](images/leqn112.gif) |
is the value of STD= |
![[equation]](images/leqn113.gif) |
is the value of MEAN= |
![[equation]](images/leqn114.gif) |
is an observation's value |
![[equation]](images/leqn115.gif) |
is a variable's mean |
![[equation]](images/leqn116.gif) |
is a variable's standard deviation. |
PROC STANDARD calculates the mean (
![[equation]](images/leqn117.gif)
) and standard deviation (
![[equation]](images/leqn118.gif)
) 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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Copyright © 2010 by SAS Institute Inc., Cary, NC, USA. All rights reserved.