t Confidence Interval for a Variance – Example

Calculate a 95% C.I. on variance for a sample (n = 35) with an S of 2.3″
Six-Sigma-t-Confidence-Interval-Variance-Example

This interval represents the most likely distribution of population variances, given the sample’s size and variance. 95% of the time, the population’s variance will fall in this interval.

This Z Confidence Interval for Proportions applies to an average proportion (which is from a binomial distribution).

Six-Sigma-Z-Confidence-Interval-Proportions-Chart

Example – Z Confidence Interval for Proportions

Six-Sigma-Z-Confidence-Interval-Proportions-Example

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