College of Chemistry Chemical Engineering Analytical Chemistry ③相对平均偏差,用a表示 100 ④标准偏差, standard deviation用s表示 (x-x) ⑤相对标准偏差( relative standard deviation,RSD S=×100%RSD ×100 ChapⅢ分析化学中的误差与数据处理 2013-2014学年Analytical Chemistry Analytical Chemistry Analytical Chemistry Analytical Chemistry Chap Ⅲ 分析化学中的误差与数据处理 2013-2014 2013-2014学年 ③ 相对平均偏差, 用 d r表示 r 100% d d x = × ④ 标准偏差, standard deviation , standard deviation , standard deviation , standard deviation用 s 表示 2 1 ( ) 1 n i i x x s n = − = − ∑ ⑤ 相对标准偏差 (relative (relative (relative (relative standard deviation, standard deviation, standard deviation, standard deviation, RSD) r 100% s s x = × 0 00 1000 / s RSD x = ×