1826 G Mohanty et al. /Materials Research Bulletin 43(2008)1814-1828 2.00 出 2.00 Run Numb 10. DFBETAS plot showing influence of each observation on the regression coefficients 1.00 0.75 0.25 口 口 0.00 Run Number Fig. 11. Cook's distance plot showing the influence of each run on regression equation1826 G. Mohanty et al. / Materials Research Bulletin 43 (2008) 1814–1828 Fig. 10. DFBETAS plot showing influence of each observation on the regression coefficients. Fig. 11. Cook’s distance plot showing the influence of each run on regression equation