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Sample Size Calculator
Responsive Sample Size Calculator
Cochran’s Formula
p = estimated proportion of the attribute in the population
Enter p (%)
e = margin of error (precision level)
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0.03
0.05
0.1
Z = value corresponding to confidence level (e.g., 1.96 for 95% confidence)
Select
80%
85%
90%
95%
98%
99%
ρ [intra-cluster correlation coefficient (ICC)]
m = average number of respondents per cluster
Final Sample Size
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