Module 5. Sample size

General sampling considerations

Considerations for household-based surveys

Calculation of sample size for a single cross-sectional cluster survey

Calculation of sample sizes for baseline and follow-up cluster surveys

Subgroup comparisons and their effect on sample size

This module provides examples and information on sample size determination. It is essential that an experienced sampling statistician be included in the team to develop and implement the sampling plan, and to undertake quality control measures as the survey progresses.

Calculating anthropometry Z-scores igrowup SAS

SAS code to calculate Z-scores


Survey Sample Size Calculator

Sample size calculation spreadsheet for single and multiple cross sectional surveys


Weighting stratified surveys

Instructions on how to calculate weights for stratified surveys


Dominican Republic - sample size calculator

Sample size spreadsheet used for the Dominican Republic national micronutrient survey


FANTA sampling guide


Sampling error and bias


WHO sampling guidelines