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Statistics LibreTexts

26: Needed Sample Size for a Confidence Interval for a Population Proportion Calculator

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  • Sample Size Calculator

    Fill in the error bound (E) and the confidence level (CL) written as a decimal, for example a 95% confidence level is 0.95.  If there is an estimate for the population proportion, check the "Have Estimate for p" radio button and then fill in the estimate in the p box that appears.  Then hit "Calculate n" and the needed sample size will be calculated for you.

     No Estimate for p Have Estimate for p Estimate for p:   E:   CL:   n:

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