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Sample Size
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Sample Size Calculator
Calculate required sample size
Population Size:
Allowed margin of error:
%
Confidence level:
80
85
90
95
99
%
Required sample size:
Estimated response rate:
%
Number to invite:
Calculate margin of error
Population Size:
Number of respondents:
Confidence level:
80
85
90
95
99
%
Margin of error:
%
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