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A method to construct simultaneous confidence intervals for least squares estimates is described. The calculation of one-at-a-time confidence intervals is very popular and straight-forward. However, one-at-a-time confidence intervals result in lower confidence levels than anticipated. Simultaneous confidence intervals are more difficult to construct, but are more theoretically sound. A power engineering state estimation application is shown; both types of confidence intervals are constructed using actual data.
Date of Publication: Jan. 2006