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Six Sigma Tutorial -> t Confidence Intervals for Mean

Six Sigma t Confidence Interval for Means

Use the t distribution for the confidence interval for a mean if the sample size n is relatively small (< 30), and/or σ is not known.

The confidence interval (C.I.) includes the shaded area under the curve in between the critical values, excluding the tail areas (the α risk). The entire curve represents the most likely distribution of population means, given the sample's size, mean, and standard deviation.


 Six Sigma t Confidence Interval for Means

 

Six Sigma t Confidence Interval for Means

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