Sample Size Calculator
Calculate Sample Size
Results
Enter values and click calculate to see results
Understanding Sample Size Calculation
Key Concepts
- Sample size determines accuracy
- Larger samples = more precise results
- Balance cost vs. precision
- Consider practical constraints
Choosing Parameters
- 95% confidence is standard
- 5% margin typical for surveys
- Higher confidence needs larger sample
- Lower margin needs larger sample
Common Applications
- Market research surveys
- Academic research
- Quality control sampling
- Political polling