A Statistical Review of the Sandgren-Ragsdell Comparative Study
A statistical analysis of the solution times of the algorithms in the Sandgren-Ragsdell study is conducted. An analysis of variance is performed to demonstrate that there is statistical evidence that selected codes are superior to others on the basis of their relative solution times. A logarithmic transformation is used to produce a seminormal distribution of the solution times with a variance assumed to be equal for all of the algorithms. A paired comparison is then conducted on the differences in the mean logarithmic solution times for each of the algorithms over the entire test problem set. The selected confidence level for all comparisons was fixed at 95%. The factors contributing to the success of this analysis are discussed as well as the additional data which would be required to conduct this type of analysis in general.
KeywordsLution Coupler Fenton
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