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Full-Text Articles in Physical Sciences and Mathematics
African Water: An Experience With Project Management In Bulima, Tanzania, Robert Sharp
African Water: An Experience With Project Management In Bulima, Tanzania, Robert Sharp
Honors Theses
Details the author's experiences researching, designing, and implementing a water system for a boarding school in Africa.
On Robustification Of Some Procedures Used In Analysis Of Covariance, Kuanwong Watcharotone
On Robustification Of Some Procedures Used In Analysis Of Covariance, Kuanwong Watcharotone
Dissertations
This study discusses robust procedures for the analysis of covariance (ANCOVA) models. These methods are based on rank-based (R) fitting procedures, which are quite analogous to the traditional ANCOVA methods based on least squares fits. Our initial empirical results show that the validity of R procedures is similar to the least squares procedures. In terms of power, there is a small loss in efficiency to least squares methods when the random errors have a normal distribution but the rank-based procedures are much more powerful for the heavy-tailed error distributions in our study.
Rank-based analogs are also developed for pick-a-point, adjusted …