Sample Size Determination
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One Sample: Estimation of Proportion
This utility can be used to calculate required sample size when you are estimating a proportion, or prevalence in a population.
Formula used and other details
Your guesstimate of Proportion %
Enter positive number between 0.01 to 99.99
Required
Approxiate estimate of proportion (in percentage) based on previous studies / pilot studies etc. Should be between 0.01 to 99.99
Confidence Level %
Enter positive number between 0.01 to 99.99
Required
In percentage. Commonly used values are 95, 99 and 90. Should be between 0.01 to 99.99.
Allowable error
Enter positive number between 0.01 to 99.99
Required
Absolute
Relative
In percentage. Should be between 0.01 to 99.99.
Sample Size Required =