World Health Organization Sample Size Calculator

Introduction & Importance

… Detailed explanation of the World Health Organization sample size calculator and its significance …

How to Use This Calculator

1. Enter the population size…
2. Select the desired confidence level…
3. Enter the acceptable margin of error…
4. Click ‘Calculate’…

Formula & Methodology

… Detailed explanation of the formula and methodology behind the calculator …

Real-World Examples

… Detailed case studies with specific numbers …

Data & Statistics

Comparison of Sample Sizes at Different Confidence Levels

Confidence Level	Sample Size
90%	158
95%	212
99%	462

Comparison of Sample Sizes at Different Margin of Errors

Margin of Error	Sample Size
5%	384
3%	1067
1%	9605

Expert Tips

• Always round up the calculated sample size…
• Consider using a sample size calculator for complex studies…

Interactive FAQ

What is a confidence level?

… Detailed explanation …

How does the margin of error affect sample size?

… Detailed explanation …

World Health Organization – Surveillance

CDC – Health Literacy