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  • anna williams thinks this is interesting:

Binary success rates are essentially proportions: the proportion of users who completed a given task successfully. For example, if 5 of the 10 participants completed a task, the success rate is 5/10 = 0.5. The appropriate way to calculate a confidence interval for a proportion like this is to use a binomial confidence interval.

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Cover of Measuring the User Experience, 2nd Edition

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DAWSON REPORT - mention