Concerns about Least Squares Estimation for the Three-Parameter Weibull Distribution: Case Study of Statistical Software
Journal: Digital Commons - Otterbein (Otterbein University)
Year: 2015

Least Squares estimation of the 2-parameter Weibull distribution is straightforward; however, there are multiple methods for least squares estimation of the 3-parameter Weibull. The third parameter for the 3-parameter Weibull distribution shifts the origin from 0 to some generally positive value sometimes called the location, threshold, or minimum life. The different methods used by the packages result in fairly major differences in the estimated parameters between the statistical packages. This