Browsing by Author "Pimpan Amphanthong"
Pimpan Amphanthong; Prachoom Suwattee, advisor (National Institute of Development Administration, 2009)
In linear models, the ordinary least squares estimators of have always turned out to be the best linear unbiased estimates. When the sample data contain outliers, the outliers may have a considerable effect on the least-squares estimates of , and an alternative approach to the problem is needed to obtain a better fit of the model or more precise estimates of . In this study, new weights were constructed for the sample data from two new influence functions and applied in the estimation of regression coefficients with outliers. Two sets of ...