The UNIVARIATE Procedure

WEIGHT Statement

Specifies weights for analysis variables in the statistical calculations.

See also: For information about how to calculate weighted statistics and for an example that uses the WEIGHT statement, see Calculating Weighted Statistics

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 UNIVARIATE...

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

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, mode, extreme values, extreme observations, or number of missing values. The Student's t test is the only test of location that PROC UNIVARIATE computes when you weight the analysis variables.

Restriction: The CIPCTLDF, CIPCTLNORMAL, LOCCOUNT, NORMAL, ROBUSTSCALE, TRIMMED=, and WINSORIZED= options are not available with the WEIGHT statement.
Restriction: To compute weighted skewness or kurtosis, use VARDEF=DF or VARDEF=N in the PROC statement.
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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Weight value...	PROC UNIVARIATE...
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

Restriction:	The CIPCTLDF, CIPCTLNORMAL, LOCCOUNT, NORMAL, ROBUSTSCALE, TRIMMED=, and WINSORIZED= options are not available with the WEIGHT statement.
Restriction:	To compute weighted skewness or kurtosis, use VARDEF=DF or VARDEF=N in the PROC statement.
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.