The SURVEYMEANS Procedure

Total

If you specify the keyword SUM, the procedure computes the estimate of the population total from the survey data. The estimate of the total is the weighted sum over the sample:

\[  \widehat{Y} = \sum _{h=1}^ H\sum _{i=1}^{n_ h} \sum _{j=1}^{m_{hi}} ~  w_{hij} ~  y_{hij}  \]

For a categorical variable level, $ \widehat{Y} $ estimates its total frequency in the population.