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2017 14 (word)


4 1 ^ 2 ^ 3 4 5 6 ڧ 3~5 1 2 ަ˧ 3 1 x1 , x2 ,?, xn , x s 2 1 s 2 ? [( x1 ? x) 2 ? ( x 2 ? x) 2 ? ? ? ( x n ? x) 2 ] n 2 1 1 s 2 ? [( x1 ? x) 2 ? ( x 2 ? x) 2 ? ? ? ( x n ? x) 2 ] n 2 2 1 2 2 2 [( x1 ? x 2 ? ? ? xn ) ? nx ] n 2 1 2 2 2 2 s ? [( x1 ? x 2 ? ? ? x n )] ? x n s2 ? 3 2 1 2 2 s 2 ? [( x'1 ? x' 2 2 ? ? ? x' n ) ? n x' ] n a x'1 ? x1 ? a x' 2 ? x2 ? a x' n ? xn ? a s ? 2 2 1 2 2 [( x'1 ? x' 2 2 ? ? ? x ' n )] ? x ' n 4 x1 , x2 ,?, xn , x'1 ? x1 ? a x' 2 ? x2 ? a x' n ? xn ? a 1 x'1 , x' 2 ,?, x' n , 3 s s ? s2 ? 1 [(x1 ? x) 2 ? ( x2 ? x) 2 ? ? ? ( xn ? x) 2 ] n 1. 2017 3 100 40% 60% 80 90 A80 B82 C84 D86 2 2017 3 ԧ 8 5249565452515554 A52 54 B52 C53 D54 3 2017 3

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