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Quantitative Usability, Statistics & Six Sigma by Jeff Sauro
Sample Size Calculator for a Completion Rate
by Jeff Sauro | January 4, 2008 :: RSS Subscribe to RSS Feed of Measuring Usability Updates

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Use this calculator to understand how sample size changes will affect the confidence interval around a completion rate. For more context, see the Sample Size article.

Known Users: Most Likely Completion Rates

 

Known Minimum Completion Rate: Unknown Users

 

The calculations are derived from the Adjusted-Wald binomial confidence interval.

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