Publication date: 04/12/2021

The Confidence Interval options for continuous variables display confidence intervals for the mean and standard deviation. The 0.90, 0.95, and 0.99 options compute two-sided confidence intervals for the mean and standard deviation. Use the Confidence Interval > Other option to select a confidence level, and select one-sided or two-sided confidence intervals. You can also enter a known sigma. If you use a known sigma, the confidence interval for the mean is based on z-values rather than t-values.

The Confidence Intervals report shows the mean and standard deviation parameter estimates with upper and lower confidence limits for 1 - α.

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