This document describes a R function called stratify that implements the “cumulative square root frequency method” for computing approximately optimal stratification of sampling units assuming a stratified random sampling design with Neyman allocation.

This document describes a R function called "allocate" for computing the optimal allocation for stratified random sampling.

This document introduces the use of the survey package for R for estimating ratios as well as using ratio and regression estimators.

This document introduces the use of the survey package for R for making inferences using survey data collected using a cluster sampling design.

This document introduces the use of the survey package for R for making inferences using data collected using a stratified random sampling design.

This document introduces the use of the survey package for R for making inferences using data collected using a simple random sampling design.