The SURVEYMEANS procedure produces estimates of population means and totals from sample survey data. The procedure also computes estimates of proportions for categorical variables, estimates of quantiles for continuous variables, and ratio estimates of means and proportions. For all of these statistics, PROC SURVEYMEANS provides standard errors, confidence limits, and t tests.

PROC SURVEYMEANS provides domain analysis, which computes estimates for subpopulations or domains, in addition to analysis for the entire study population. Formation of subpopulations can be unrelated to the sample design, and so the domain sample sizes can actually be random variables. Domain analysis takes this variability into account by using the entire sample in estimating the variance of domain estimates. Domain analysis is also known as subgroup analysis, subpopulation analysis, or subdomain analysis.

See Chapter 85, The SURVEYMEANS Procedure, for more information.