The SURVEYMEANS Procedure

Mean

When you specify the keyword MEAN, the procedure computes the estimate of the mean (mean per element) from the survey data. Also, the procedure computes the mean by default if you do not specify any statistic-keywords in the PROC SURVEYMEANS  statement.

PROC SURVEYMEANS  computes the estimate of the mean as

where

is the sum of the weights over all observations in the sample.