Sample Size Calculator
Free online sample size calculator. Required sample size for significance. Visualize data easily.
Sample Size Calculator
Required Sample Size
385
n₀ = (1.9600² × 0.5 × 0.5) / 0.05²
Z-Score (95%)
1.9600
Unadjusted (n₀)
385
Interpretation
We need 385 respondents for 95% confidence ±5%
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