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Quantitative Usability, Statistics & Six Sigma by Jeff Sauro



April 22, 2008 | asked by Kenya :

Question : When calculating confidence interval estimates...how is the x and standard deviation calculated?

Answer : By x, I think you're referring to the mean, which is just the average (arithmetic mean usually) of the sample of data. To calculate the standard deviation see this entry.

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Confidence Intervals2
Standard Deviation2

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