G M A T GMAT GMAT currency1 “ GMAT fifl ” currency11.mode( ) ( e.g. mode of1,1,1,2,3,0,0,0,5 is 1 and 0 )2.range( ) ( e.g. range of 1,1,2,3,5 is 5-1=4 )3.mean( )arithmatic mean( ) ( ?)geometric mean ( ) n n 4.median( ) ( ) ( )( e.g. median of1,7,4,9,2,2,2,2,2,5,8 is 2 / median of 1,7,4,9,2,5 is (5+7)/2=6 )5.standard error( ) “ (n)e.g. standard error of 0,2,5,7,6 is:(|0-4|+|2-4|+|5-4|+|7-4|+|6-4|)/5=2.4 )6.standard variation “ne.g.standard variation of 0,2,5,7,6 is:_ 2 2 2 2 2_|_(0-4)+(2-4)+(5-4)+(7-4)+(6-4)_|/5=6.87.standard deviation standard variation d2=(a1-a)2+(a2-a)2+.+(an-a)2 /nd 8. C2=A2+B2-2ABCOStt AB 9. Y=k1X+B1,Y=k2X+B2 K1K2=-110. 2 3 5 sqrt(2)=1.414 sqrt(3)=1.732sqrt(5)=2.236 sqrt(10)=3.16211. a if only b: b-a12. P= 足某 所有能 量/所有能 量性质 00,称P(B|A)=P(A*B)/P(A)如果 能够 GMAT 有 全 掌握 那么 各类GMAT 题型真题 fifl会 有优势也会 顺利currency1智课编建议 “把 作 顺 梳 currency1