Measuring Usability: Quantitative Usability, Statistics and Six-Sigma

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The following pages have the tag Adjusted Wald associated with them. The number of users that have also tagged the page ' Adjusted Wald ' is in parenthesis.

Confidence Interval Calculator for a Completion Rate ( 134 )
If you've wanted to provide a confidence interval around a small sample completion rate but just didn't have time to do the math, this calculator does the work for you.

Questions

The following questions have the tag Adjusted Wald associated with them. The number of users that have also tagged the question ' Adjusted Wald ' is in parenthesis.

Hi Jeff thanks for all your help so far, your answers have been great and very timely. It is great t. . . ( 1 )

When you calculate CIs for time on task, I notice that you use the critical value from the t-distrib. . . ( 4 )

Jeff: Can you possibly share the actual formula you are using in this application to produce the . . . ( 4 )

how to calculate one sided 95% confidence limits for a proportion.could you provide a formula . . . ( 5 )

in a sample of 1000 tv vieweres 330 watched a particlar programme. find 99 pecent confidence limits . . . ( 5 )

If 350 respondents out of a random sample of 1,000 Americans reported that they did not trust their . . . ( 5 )