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The STANDARD Procedure

WEIGHT Statement

Specifies weights for analysis variables in the statistical calculations.

See also: For information on calculating weighted statistics and for an example that uses the WEIGHT statement, see WEIGHT

WEIGHT variable;

Required Arguments

variable
specifies a numeric variable whose values weight the values of the analysis variables. The values of the variable do not have to be integers. If the value of the weight variable is

Weight value... PROC STANDARD...
0 counts the observation in the total number of observations
less than 0 converts the weight value to zero and counts the observation in the total number of observations
missing excludes the observation from the calculation of mean and standard deviation

To exclude observations that contain negative and zero weights from the calculation of mean and standard deviation, use EXCLNPWGT. Note that most SAS/STAT procedures, such as PROC GLM, exclude negative and zero weights by default.
Tip: When you use the WEIGHT statement, consider which value of the VARDEF= option is appropriate. See VARDEF= and the calculation of weighted statistics in Keywords and Formulas for more information.

Note:   Prior to Version 7 of the SAS System, the procedure did not exclude the observations with missing weights from the count of observations.  [cautionend]


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