specifies a numeric
variable whose values weight the values of the variables that are
specified in the VAR statement. The variable does not have to be an
integer. The following table describes how PROC MEANS treats various
values of the WEIGHT variable.
To exclude observations
that contain negative and zero weights from the analysis, use EXCLNPWGT.
Note that most
SAS/STAT procedures, such as PROC GLM, exclude negative
and zero weights by default.
The weight variable
does not change how the procedure determines the range, extreme values,
or number of missing values.
Restrictions:To compute weighted quantiles, use QMETHOD=OS in the
PROC statement.
Skewness and kurtosis are not available with the WEIGHT
option.
Note:Before Version 7 of SAS, the procedure did not exclude
the observations with missing weights from the count of observations.
Tips:When you use the WEIGHT option, consider which value of
the VARDEF= option is appropriate. See the discussion of VARDEF=..
Use the WEIGHT option in multiple VAR statements to specify
different weights for the analysis variables.